diff --git a/.github/workflows/appbuild.yml b/.github/workflows/appbuild.yml
deleted file mode 100644
index c7019b8b7..000000000
--- a/.github/workflows/appbuild.yml
+++ /dev/null
@@ -1,43 +0,0 @@
-name: Package build
-
-on:
-  push:
-    branches:
-      - main
-      - master
-      - stable*
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-
-    strategy:
-      matrix:
-        node-version: [14.x]
-
-    steps:
-    - uses: actions/checkout@v3
-    - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v3
-      with:
-        node-version: ${{ matrix.node-version }}
-    - name: Set up npm7
-      run: npm i -g npm@7
-    - name: Setup PHP
-      uses: shivammathur/setup-php@2.21.2
-      with:
-        php-version: '7.4'
-        tools: composer
-    - name: install dependencies
-      run: |
-        wget https://github.com/ChristophWurst/krankerl/releases/download/v0.12.2/krankerl_0.12.2_amd64.deb
-        sudo dpkg -i krankerl_0.12.2_amd64.deb
-    - name: package
-      run: |
-        uname -a
-        RUST_BACKTRACE=1 krankerl --version
-        RUST_BACKTRACE=1 krankerl package
-    - uses: actions/upload-artifact@v3
-      with:
-        name: Deck app tarball
-        path: build/artifacts/deck.tar.gz
diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
index 8c1ed26f5..a14dd4fff 100644
--- a/.github/workflows/integration.yml
+++ b/.github/workflows/integration.yml
@@ -70,6 +70,13 @@ jobs:
         with:
           path: apps/${{ env.APP_NAME }}
 
+      -   name: Checkout activity
+          uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
+          with:
+              repository: nextcloud/activity
+              ref: ${{ matrix.server-versions }}
+              path: apps/activity
+
       - name: Set up php ${{ matrix.php-versions }}
         uses: shivammathur/setup-php@2.25.4
         with:
diff --git a/composer.json b/composer.json
index 24185bc56..1bf244c3d 100644
--- a/composer.json
+++ b/composer.json
@@ -42,7 +42,8 @@
 			"@test:integration"
 		],
 		"test:unit": "phpunit -c tests/phpunit.xml",
-		"test:integration": "phpunit -c tests/phpunit.integration.xml && cd tests/integration && ./run.sh"
+		"test:integration": "phpunit -c tests/phpunit.integration.xml",
+		"test:api": "cd tests/integration && ./run.sh"
 	},
 	"autoload-dev": {
 		"psr-4": {
diff --git a/lib/Activity/ActivityManager.php b/lib/Activity/ActivityManager.php
index 4a74e2d9d..511cc5538 100644
--- a/lib/Activity/ActivityManager.php
+++ b/lib/Activity/ActivityManager.php
@@ -38,6 +38,7 @@
 use OCA\Deck\Db\Label;
 use OCA\Deck\Db\Stack;
 use OCA\Deck\Db\StackMapper;
+use OCA\Deck\NoPermissionException;
 use OCA\Deck\Service\PermissionService;
 use OCP\Activity\IEvent;
 use OCP\Activity\IManager;
@@ -559,4 +560,24 @@ private function findDetailsForAcl($aclId) {
 			'board' => $board
 		];
 	}
+
+	public function canSeeCardActivity(int $cardId): bool {
+		try {
+			$this->permissionService->checkPermission($this->cardMapper, $cardId, Acl::PERMISSION_READ);
+			$card = $this->cardMapper->find($cardId);
+			return $card->getDeletedAt() === 0;
+		} catch (NoPermissionException $e) {
+			return false;
+		}
+	}
+
+	public function canSeeBoardActivity(int $boardId): bool {
+		try {
+			$this->permissionService->checkPermission($this->boardMapper, $boardId, Acl::PERMISSION_READ);
+			$board = $this->boardMapper->find($boardId);
+			return $board->getDeletedAt() === 0;
+		} catch (NoPermissionException $e) {
+			return false;
+		}
+	}
 }
diff --git a/lib/Activity/DeckProvider.php b/lib/Activity/DeckProvider.php
index a2a5c9d8c..4c12154e6 100644
--- a/lib/Activity/DeckProvider.php
+++ b/lib/Activity/DeckProvider.php
@@ -111,6 +111,9 @@ public function parse($language, IEvent $event, IEvent $previousEvent = null) {
 			$event->setAuthor($author);
 		}
 		if ($event->getObjectType() === ActivityManager::DECK_OBJECT_BOARD) {
+			if (!$this->activityManager->canSeeBoardActivity($event->getObjectId())) {
+				throw new \InvalidArgumentException();
+			}
 			if (isset($subjectParams['board']) && $event->getObjectName() === '') {
 				$event->setObject($event->getObjectType(), $event->getObjectId(), $subjectParams['board']['title']);
 			}
@@ -125,6 +128,9 @@ public function parse($language, IEvent $event, IEvent $previousEvent = null) {
 		}
 
 		if (isset($subjectParams['card']) && $event->getObjectType() === ActivityManager::DECK_OBJECT_CARD) {
+			if (!$this->activityManager->canSeeCardActivity($event->getObjectId())) {
+				throw new \InvalidArgumentException();
+			}
 			if ($event->getObjectName() === '') {
 				$event->setObject($event->getObjectType(), $event->getObjectId(), $subjectParams['card']['title']);
 			}
diff --git a/lib/Db/Card.php b/lib/Db/Card.php
index ed710d716..599a93a72 100644
--- a/lib/Db/Card.php
+++ b/lib/Db/Card.php
@@ -36,6 +36,8 @@
  * @method int getLastModified()
  * @method int getCreatedAt()
  * @method bool getArchived()
+ * @method int getDeletedAt()
+ * @method void setDeletedAt(int $deletedAt)
  * @method bool getNotified()
  *
  * @method void setLabels(Label[] $labels)
diff --git a/lib/Service/BoardService.php b/lib/Service/BoardService.php
index 3cf163d9e..e06b5d3a6 100644
--- a/lib/Service/BoardService.php
+++ b/lib/Service/BoardService.php
@@ -473,7 +473,7 @@ public function addAcl($boardId, $type, $participant, $edit, $share, $manage) {
 		$newAcl = $this->aclMapper->insert($acl);
 
 		$this->activityManager->triggerEvent(ActivityManager::DECK_OBJECT_BOARD, $newAcl, ActivityManager::SUBJECT_BOARD_SHARE, [], $this->userId);
-		$this->notificationHelper->sendBoardShared((int)$boardId, $acl);
+		$this->notificationHelper->sendBoardShared($boardId, $acl);
 		$this->boardMapper->mapAcl($newAcl);
 		$this->changeHelper->boardChanged($boardId);
 
diff --git a/lib/Service/CardService.php b/lib/Service/CardService.php
index 8eb677d1d..791849a24 100644
--- a/lib/Service/CardService.php
+++ b/lib/Service/CardService.php
@@ -267,7 +267,7 @@ public function delete($id) {
 	public function update($id, $title, $stackId, $type, $owner, $description = '', $order = 0, $duedate = null, $deletedAt = null, $archived = null) {
 		$this->cardServiceValidator->check(compact('id', 'title', 'stackId', 'type', 'owner', 'order'));
 
-		$this->permissionService->checkPermission($this->cardMapper, $id, Acl::PERMISSION_EDIT);
+		$this->permissionService->checkPermission($this->cardMapper, $id, Acl::PERMISSION_EDIT, null, true);
 		$this->permissionService->checkPermission($this->stackMapper, $stackId, Acl::PERMISSION_EDIT);
 
 		if ($this->boardService->isArchived($this->cardMapper, $id)) {
@@ -279,9 +279,9 @@ public function update($id, $title, $stackId, $type, $owner, $description = '',
 		}
 
 		if ($card->getDeletedAt() !== 0) {
-			if ($deletedAt === null) {
+			if ($deletedAt === null || $deletedAt > 0) {
 				// Only allow operations when restoring the card
-				throw new StatusException('Operation not allowed. This card was deleted.');
+				throw new NoPermissionException('Operation not allowed. This card was deleted.');
 			}
 		}
 
diff --git a/lib/Service/CommentService.php b/lib/Service/CommentService.php
index e9768d710..34fe2ab25 100644
--- a/lib/Service/CommentService.php
+++ b/lib/Service/CommentService.php
@@ -77,24 +77,17 @@ public function list(string $cardId, int $limit = 20, int $offset = 0): DataResp
 	}
 
 	/**
-	 * @param string $cardId
-	 * @param string $message
-	 * @param string $replyTo
-	 * @return DataResponse
 	 * @throws BadRequestException
 	 * @throws NotFoundException|NoPermissionException
 	 */
-	public function create(string $cardId, string $message, string $replyTo = '0'): DataResponse {
-		if (!is_numeric($cardId)) {
-			throw new BadRequestException('A valid card id must be provided');
-		}
+	public function create(int $cardId, string $message, string $replyTo = '0'): DataResponse {
 		$this->permissionService->checkPermission($this->cardMapper, $cardId, Acl::PERMISSION_READ);
 
 		// Check if parent is a comment on the same card
 		if ($replyTo !== '0') {
 			try {
 				$comment = $this->commentsManager->get($replyTo);
-				if ($comment->getObjectType() !== Application::COMMENT_ENTITY_TYPE || $comment->getObjectId() !== $cardId) {
+				if ($comment->getObjectType() !== Application::COMMENT_ENTITY_TYPE || (int)$comment->getObjectId() !== $cardId) {
 					throw new CommentNotFoundException();
 				}
 			} catch (CommentNotFoundException $e) {
@@ -103,7 +96,7 @@ public function create(string $cardId, string $message, string $replyTo = '0'):
 		}
 
 		try {
-			$comment = $this->commentsManager->create('users', $this->userId, Application::COMMENT_ENTITY_TYPE, $cardId);
+			$comment = $this->commentsManager->create('users', $this->userId, Application::COMMENT_ENTITY_TYPE, (string)$cardId);
 			$comment->setMessage($message);
 			$comment->setVerb('comment');
 			$comment->setParentId($replyTo);
@@ -139,7 +132,7 @@ public function update(string $cardId, string $commentId, string $message): Data
 			throw new NoPermissionException('Only authors are allowed to edit their comment.');
 		}
 		if ($comment->getParentId() !== '0') {
-			$this->permissionService->checkPermission($this->cardMapper, $comment->getParentId(), Acl::PERMISSION_READ);
+			$this->permissionService->checkPermission($this->cardMapper, (int)$comment->getParentId(), Acl::PERMISSION_READ);
 		}
 
 		$comment->setMessage($message);
diff --git a/lib/Service/PermissionService.php b/lib/Service/PermissionService.php
index 23126a23c..3ec01218e 100644
--- a/lib/Service/PermissionService.php
+++ b/lib/Service/PermissionService.php
@@ -29,6 +29,7 @@
 use OCA\Deck\Db\AclMapper;
 use OCA\Deck\Db\Board;
 use OCA\Deck\Db\BoardMapper;
+use OCA\Deck\Db\CardMapper;
 use OCA\Deck\Db\IPermissionMapper;
 use OCA\Deck\Db\User;
 use OCA\Deck\NoPermissionException;
@@ -97,13 +98,18 @@ public function __construct(
 	 * @param $boardId
 	 * @return bool|array
 	 */
-	public function getPermissions($boardId) {
+	public function getPermissions($boardId, ?string $userId = null) {
+		if ($userId === null) {
+			$userId = $this->userId;
+		}
+
 		if ($cached = $this->permissionCache->get($boardId)) {
 			return $cached;
 		}
 
-		$owner = $this->userIsBoardOwner($boardId);
-		$acls = $this->aclMapper->findAll($boardId);
+		$board = $this->getBoard($boardId);
+		$owner = $this->userIsBoardOwner($boardId, $userId);
+		$acls = $board->getDeletedAt() === 0 ? $this->aclMapper->findAll($boardId) : [];
 		$permissions = [
 			Acl::PERMISSION_READ => $owner || $this->userCan($acls, Acl::PERMISSION_READ),
 			Acl::PERMISSION_EDIT => $owner || $this->userCan($acls, Acl::PERMISSION_EDIT),
@@ -111,7 +117,7 @@ public function getPermissions($boardId) {
 			Acl::PERMISSION_SHARE => ($owner || $this->userCan($acls, Acl::PERMISSION_SHARE))
 				&& (!$this->shareManager->sharingDisabledForUser($this->userId))
 		];
-		$this->permissionCache->set($boardId, $permissions);
+		$this->permissionCache->set((string)$boardId, $permissions);
 		return $permissions;
 	}
 
@@ -137,13 +143,10 @@ public function matchPermissions(Board $board) {
 	/**
 	 * check permissions for replacing dark magic middleware
 	 *
-	 * @param $mapper IPermissionMapper|null null if $id is a boardId
-	 * @param $id int unique identifier of the Entity
-	 * @param $permission int
-	 * @return bool
+	 * @param numeric $id
 	 * @throws NoPermissionException
 	 */
-	public function checkPermission($mapper, $id, $permission, $userId = null) {
+	public function checkPermission($mapper, $id, $permission, $userId = null, bool $allowDeletedCard = false) {
 		$boardId = $id;
 		if ($mapper instanceof IPermissionMapper && !($mapper instanceof BoardMapper)) {
 			$boardId = $mapper->findBoardId($id);
@@ -157,12 +160,20 @@ public function checkPermission($mapper, $id, $permission, $userId = null) {
 			throw new NoPermissionException('Permission denied');
 		}
 
-		if ($this->userIsBoardOwner($boardId, $userId)) {
-			return true;
-		}
-
 		try {
-			$acls = $this->getBoard($boardId)->getAcl() ?? [];
+			$permissions = $this->getPermissions($boardId, $userId);
+			if ($permissions[$permission] === true) {
+				if (!$allowDeletedCard && $mapper instanceof CardMapper) {
+					$card = $mapper->find($id);
+					if ($card->getDeletedAt() > 0) {
+						throw new NoPermissionException('Card is deleted');
+					}
+				}
+
+				return true;
+			}
+
+			$acls = $this->getBoard((int)$boardId)->getAcl() ?? [];
 			$result = $this->userCan($acls, $permission, $userId);
 			if ($result) {
 				return true;
diff --git a/lib/Sharing/ShareAPIHelper.php b/lib/Sharing/ShareAPIHelper.php
index 5528b6a92..41a5dfc6d 100644
--- a/lib/Sharing/ShareAPIHelper.php
+++ b/lib/Sharing/ShareAPIHelper.php
@@ -115,7 +115,7 @@ private function parseDate(string $expireDate): \DateTime {
 	 */
 	public function canAccessShare(IShare $share, string $user): bool {
 		try {
-			$this->permissionService->checkPermission($this->cardMapper, $share->getSharedWith(), Acl::PERMISSION_READ, $user);
+			$this->permissionService->checkPermission($this->cardMapper, (int)$share->getSharedWith(), Acl::PERMISSION_READ, $user);
 		} catch (NoPermissionException $e) {
 			return false;
 		}
diff --git a/tests/integration/features/acl.feature b/tests/integration/features/acl.feature
index 2937a377f..1a9677fc1 100644
--- a/tests/integration/features/acl.feature
+++ b/tests/integration/features/acl.feature
@@ -90,3 +90,53 @@ Feature: acl
 		And the current user should not have "edit" permissions on the board
 		And the current user should have "share" permissions on the board
 		And the current user should not have "manage" permissions on the board
+
+	Scenario: Share a board multiple times
+		Given Logging in using web as "user0"
+		And creates a board named "Double shared board" with color "ff0000"
+		And shares the board with user "user1"
+		And shares the board with group "group1"
+		And creates a board named "Single shared board" with color "00ff00"
+		And shares the board with user "user1"
+		When Logging in using web as "user1"
+		And fetching the board list
+		Then the response should have a status code "200"
+		And the response should be a list of objects
+		And the response should contain an element with the properties
+			| property | value |
+			| title | Double shared board |
+
+
+	Scenario: Deleted board is inaccessible to share recipients
+		Given acting as user "user0"
+		When creates a board with example content
+		And remember the last card as "user0-card"
+		When post a comment with content "hello comment" on the card
+		And uploads an attachment to the last used card
+		And remember the last attachment as "user0-attachment"
+		And shares the board with user "user1"
+		Then the HTTP status code should be "200"
+		And delete the board
+
+		Given acting as user "user1"
+		When fetching the attachments for the card "user0-card"
+		Then the response should have a status code 403
+
+		When get the comments on the card
+		Then the response should have a status code 403
+
+		When update a comment with content "hello deleted" on the card
+		Then the response should have a status code 403
+
+		When delete the comment on the card
+		Then the response should have a status code 403
+		# 644
+		When post a comment with content "hello deleted" on the card
+		Then the response should have a status code 403
+
+		When get the card details
+		Then the response should have a status code 403
+		When fetching the attachment "user0-attachment" for the card "user0-card"
+		Then the response should have a status code 403
+		When deleting the attachment "user0-attachment" for the card "user0-card"
+		Then the response should have a status code 403
diff --git a/tests/integration/features/bootstrap/AttachmentContext.php b/tests/integration/features/bootstrap/AttachmentContext.php
index 051789aec..84ef35048 100644
--- a/tests/integration/features/bootstrap/AttachmentContext.php
+++ b/tests/integration/features/bootstrap/AttachmentContext.php
@@ -87,4 +87,14 @@ public function fetchingTheAttachmentForTheCard($attachmentReference, $cardRefer
 
 		$this->requestContext->sendPlainRequest('GET', '/index.php/apps/deck/cards/' . $cardId . '/attachment/file:' . $attachmentId);
 	}
+
+	/**
+	 * @When fetching the attachments for the card :cardReference
+	 */
+	public function fetchingTheAttachmentsForTheCard($cardReference) {
+		$cardId = $this->boardContext->getRememberedCard($cardReference)['id'] ?? null;
+		Assert::assertNotNull($cardId, 'Card needs to be available');
+
+		$this->requestContext->sendPlainRequest('GET', '/index.php/apps/deck/cards/' . $cardId . '/attachments');
+	}
 }
diff --git a/tests/integration/features/bootstrap/BoardContext.php b/tests/integration/features/bootstrap/BoardContext.php
index 420a7d410..2a7f2bc7c 100644
--- a/tests/integration/features/bootstrap/BoardContext.php
+++ b/tests/integration/features/bootstrap/BoardContext.php
@@ -17,9 +17,9 @@ class BoardContext implements Context {
 	/** @var array last card response */
 	private $card = null;
 	private array $storedCards = [];
+	private ?array $activities = null;
 
-	/** @var ServerContext */
-	private $serverContext;
+	private ServerContext $serverContext;
 
 	/** @BeforeScenario */
 	public function gatherContexts(BeforeScenarioScope $scope) {
@@ -186,7 +186,9 @@ public function setTheDescriptionTo($description) {
 			['description' => $description]
 		));
 		$this->requestContext->getResponse()->getBody()->seek(0);
-		$this->card = json_decode((string)$this->getResponse()->getBody(), true);
+		if ($this->requestContext->getResponse()->getStatusCode() === 200) {
+			$this->card = json_decode((string)$this->getResponse()->getBody(), true);
+		}
 	}
 
 	/**
@@ -198,7 +200,22 @@ public function setCardAttribute($attribute, $value) {
 			[$attribute => $value]
 		));
 		$this->requestContext->getResponse()->getBody()->seek(0);
-		$this->card = json_decode((string)$this->getResponse()->getBody(), true);
+		if ($this->requestContext->getResponse()->getStatusCode() === 200) {
+			$this->card = json_decode((string)$this->getResponse()->getBody(), true);
+		}
+	}
+
+	/**
+	 * @Given /^get the card details$/
+	 */
+	public function getCard() {
+		$this->requestContext->sendJSONrequest('GET', '/index.php/apps/deck/cards/' . $this->card['id'], array_merge(
+			$this->card
+		));
+		$this->requestContext->getResponse()->getBody()->seek(0);
+		if ($this->requestContext->getResponse()->getStatusCode() === 200) {
+			$this->card = json_decode((string)$this->getResponse()->getBody(), true);
+		}
 	}
 
 	/**
@@ -253,4 +270,36 @@ public function rememberTheLastCardAs($arg1) {
 	public function getRememberedCard($arg1) {
 		return $this->storedCards[$arg1] ?? null;
 	}
+
+	/**
+	 * @Given /^delete the card$/
+	 */
+	public function deleteTheCard() {
+		$this->requestContext->sendJSONrequest('DELETE', '/index.php/apps/deck/cards/' . $this->card['id']);
+		$this->card['deletedAt'] = time();
+	}
+
+	/**
+	 * @Given /^delete the board/
+	 */
+	public function deleteTheBoard() {
+		$this->requestContext->sendJSONrequest('DELETE', '/index.php/apps/deck/boards/' . $this->board['id']);
+	}
+
+
+	/**
+	 * @Given /^get the activities for the last card$/
+	 */
+	public function getActivitiesForTheLastCard() {
+		$card = $this->getLastUsedCard();
+		$this->requestContext->sendOCSRequest('GET', '/apps/activity/api/v2/activity/filter?format=json&type=deck&since=0&object_type=deck_card&object_id=' . $card['id'] . '&limit=50');
+		$this->activities = json_decode((string)$this->getResponse()->getBody(), true)['ocs']['data'] ?? null;
+	}
+
+	/**
+	 * @Then the fetched activities should have :count entries
+	 */
+	public function theFetchedActivitiesShouldHaveEntries($count) {
+		Assert::assertEquals($count, count($this->activities ?? []));
+	}
 }
diff --git a/tests/integration/features/bootstrap/CommentContext.php b/tests/integration/features/bootstrap/CommentContext.php
index 40b6f4e45..aba5a6065 100644
--- a/tests/integration/features/bootstrap/CommentContext.php
+++ b/tests/integration/features/bootstrap/CommentContext.php
@@ -11,6 +11,8 @@ class CommentContext implements Context {
 	/** @var BoardContext */
 	protected $boardContext;
 
+	private $lastComment = null;
+
 	/** @BeforeScenario */
 	public function gatherContexts(BeforeScenarioScope $scope) {
 		$environment = $scope->getEnvironment();
@@ -27,5 +29,33 @@ public function postACommentWithContentOnTheCard($content) {
 			'message' => $content,
 			'parentId' => null
 		]);
+		$this->lastComment = $this->requestContext->getResponseBodyFromJson()['ocs']['data'] ?? null;
+	}
+
+	/**
+	 * @Given /^get the comments on the card$/
+	 */
+	public function getCommentsOnTheCard() {
+		$card = $this->boardContext->getLastUsedCard();
+		$this->requestContext->sendOCSRequest('GET', '/apps/deck/api/v1.0/cards/' . $card['id'] . '/comments');
+	}
+
+	/**
+	 * @When /^update a comment with content "([^"]*)" on the card$/
+	 */
+	public function updateACommentWithContentOnTheCard($content) {
+		$card = $this->boardContext->getLastUsedCard();
+		$this->requestContext->sendOCSRequest('PUT', '/apps/deck/api/v1.0/cards/' . $card['id'] . '/comments/'. $this->lastComment['id'], [
+			'message' => $content,
+			'parentId' => null
+		]);
+	}
+
+	/**
+	 * @When /^delete the comment on the card$/
+	 */
+	public function deleteTheCommentOnTheCard() {
+		$card = $this->boardContext->getLastUsedCard();
+		$this->requestContext->sendOCSRequest('DELETE', '/apps/deck/api/v1.0/cards/' . $card['id'] . '/comments/'. $this->lastComment['id']);
 	}
 }
diff --git a/tests/integration/features/bootstrap/RequestContext.php b/tests/integration/features/bootstrap/RequestContext.php
index 9df6be205..ebf01e80a 100644
--- a/tests/integration/features/bootstrap/RequestContext.php
+++ b/tests/integration/features/bootstrap/RequestContext.php
@@ -166,4 +166,29 @@ public function getResponseBodyFromJson() {
 		$this->getResponse()->getBody()->seek(0);
 		return json_decode((string)$this->getResponse()->getBody(), true);
 	}
+
+	/**
+	 * @Given /^the response should be a list of objects$/
+	 */
+	public function theResponseShouldBeAListOfObjects() {
+		$jsonResponse = $this->getResponseBodyFromJson();
+		Assert::assertEquals(array_keys($jsonResponse), range(0, count($jsonResponse) - 1));
+	}
+
+	/**
+	 * @When /^the response should contain an element with the properties$/
+	 */
+	public function responseContainsElement(TableNode $element) {
+		$json = $this->getResponseBodyFromJson();
+		$found = array_filter($json, function ($board) use ($element) {
+			foreach ($element as $row) {
+				if ($row['value'] !== $board[$row['property']]) {
+					return false;
+				}
+			}
+
+			return true;
+		});
+		Assert::assertEquals(1, count($found));
+	}
 }
diff --git a/tests/integration/features/bootstrap/ServerContext.php b/tests/integration/features/bootstrap/ServerContext.php
index 87b068ec8..6ed36f320 100644
--- a/tests/integration/features/bootstrap/ServerContext.php
+++ b/tests/integration/features/bootstrap/ServerContext.php
@@ -10,15 +10,15 @@ class ServerContext implements Context {
 		WebDav::__construct as private __tConstruct;
 	}
 
+	private string $rawBaseUrl;
+	private string $mappedUserId;
+	private array $lastInsertIds = [];
+
 	public function __construct($baseUrl) {
 		$this->rawBaseUrl = $baseUrl;
 		$this->__tConstruct($baseUrl . '/index.php/ocs/', ['admin', 'admin'], '123456');
 	}
 
-	/** @var string */
-	private $mappedUserId;
-
-	private $lastInsertIds = [];
 
 	/**
 	 * @BeforeSuite
diff --git a/tests/integration/features/decks.feature b/tests/integration/features/decks.feature
index 22a74baec..1913c8420 100644
--- a/tests/integration/features/decks.feature
+++ b/tests/integration/features/decks.feature
@@ -32,3 +32,80 @@ Feature: decks
     And creates a board named "MyBoard" with color "000000"
     And create a stack named "ToDo"
     When create a card named "This is a very ong name that exceeds the maximum length of a deck board created which is longer than 255 characters This is a very ong name that exceeds the maximum length of a deck board created which is longer than 255 characters This is a very ong name that exceeds the maximum length of a deck board created which is longer than 255 characters"
+
+	Scenario: Cannot access card on a deleted board
+		Given acting as user "user0"
+		And creates a board named "MyBoard" with color "000000"
+		And create a stack named "ToDo"
+		And create a card named "Overdue task"
+		And remember the last card as "deletedCard"
+		And uploads an attachment to the last used card
+		And remember the last attachment as "my-attachment"
+		And post a comment with content "My first comment" on the card
+		And delete the board
+
+		When fetching the attachment "my-attachment" for the card "deletedCard"
+		Then the response should have a status code 403
+
+		When get the comments on the card
+		Then the response should have a status code 403
+
+		When post a comment with content "My second comment" on the card
+		Then the response should have a status code 403
+
+		When uploads an attachment to the last used card
+		Then the response should have a status code 403
+
+		When set the description to "Update some text"
+		Then the response should have a status code 403
+
+		When get the card details
+		Then the response should have a status code 403
+
+		When create a card named "Overdue task"
+		Then the response should have a status code 403
+
+		When create a stack named "ToDo"
+		Then the response should have a status code 403
+
+	Scenario: Cannot access card on a deleted card
+		Given acting as user "user0"
+		And creates a board named "MyBoard" with color "000000"
+		And create a stack named "ToDo"
+		And create a card named "Overdue task"
+		And remember the last card as "deletedCard"
+		And uploads an attachment to the last used card
+		And remember the last attachment as "my-attachment"
+		And post a comment with content "My first comment" on the card
+		When get the activities for the last card
+		Then the fetched activities should have 3 entries
+		And delete the card
+
+		When get the activities for the last card
+		Then the fetched activities should have 0 entries
+
+		When fetching the attachment "my-attachment" for the card "deletedCard"
+		Then the response should have a status code 403
+
+		When get the comments on the card
+		Then the response should have a status code 403
+
+		When post a comment with content "My second comment" on the card
+		Then the response should have a status code 403
+
+		When deleting the attachment "my-attachment" for the card "deletedCard"
+		Then the response should have a status code 403
+
+		When uploads an attachment to the last used card
+		Then the response should have a status code 403
+
+		When get the card details
+		Then the response should have a status code 403
+
+		# We currently still expect to be able to update the card as this is used to undo deletion
+		When set the description to "Update some text"
+		Then the response should have a status code 403
+		When set the card attribute "deletedAt" to "0"
+		Then the response should have a status code 200
+		When set the description to "Update some text"
+		Then the response should have a status code 200
diff --git a/tests/unit/Activity/DeckProviderTest.php b/tests/unit/Activity/DeckProviderTest.php
index 4302834cb..13cdf691e 100644
--- a/tests/unit/Activity/DeckProviderTest.php
+++ b/tests/unit/Activity/DeckProviderTest.php
@@ -74,6 +74,9 @@ public function setUp(): void {
 		$this->config = $this->createMock(IConfig::class);
 		$this->cardService = $this->createMock(CardService::class);
 		$this->provider = new DeckProvider($this->urlGenerator, $this->activityManager, $this->userManager, $this->commentsManager, $this->l10nFactory, $this->config, $this->userId, $this->cardService);
+
+		$this->activityManager->method('canSeeCardActivity')->willReturn(true);
+		$this->activityManager->method('canSeeBoardActivity')->willReturn(true);
 	}
 
 	private function mockEvent($objectType, $objectId, $objectName, $subject, $subjectParameters = []) {
diff --git a/tests/unit/Service/PermissionServiceTest.php b/tests/unit/Service/PermissionServiceTest.php
index 0994a778e..1bf00c5f3 100644
--- a/tests/unit/Service/PermissionServiceTest.php
+++ b/tests/unit/Service/PermissionServiceTest.php
@@ -240,6 +240,8 @@ public function testCheckPermission($boardId, $permission, $result, $owner = 'fo
 			->method('sharingDisabledForUser')
 			->willReturn(false);
 
+		$this->aclMapper->method('findAll')->willReturn([]);
+
 		if ($result) {
 			$actual = $this->service->checkPermission($mapper, 1234, $permission);
 			$this->assertTrue($actual);
@@ -262,6 +264,8 @@ public function testCheckPermissionWithoutMapper($boardId, $permission, $result,
 			$this->boardMapper->expects($this->any())->method('find')->willReturn($board);
 		}
 
+		$this->aclMapper->method('findAll')->willReturn([]);
+
 		if ($result) {
 			$actual = $this->service->checkPermission($mapper, 1234, $permission);
 			$this->assertTrue($actual);