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XWiki Platform vulnerable to privilege escalation via properties with wiki syntax that are executed with wrong author

Critical severity GitHub Reviewed Published Mar 1, 2023 in xwiki/xwiki-platform • Updated Mar 3, 2023

Package

maven org.xwiki.platform:xwiki-platform-legacy-oldcore (Maven)

Affected versions

>= 13.10, < 13.10.11
>= 14.0, < 14.4.7
>= 14.5, < 14.10

Patched versions

13.10.11
14.4.7
14.10
maven org.xwiki.platform:xwiki-platform-oldcore (Maven)
>= 13.10, < 13.10.11
>= 14.0, < 14.4.7
>= 14.5, < 14.10
13.10.11
14.4.7
14.10

Description

Impact

It's possible to use the right of an existing document content author to execute a text area property.

To reproduce:

  • As an admin with programming rights, create a new user without script or programming right.
  • Login with the freshly created user.
  • Insert the following text in source mode in the about section:
    {{groovy}}println("hello from groovy!"){{/groovy}}
  • Click "Save & View"

Patches

This has been patched in XWiki 14.10, 14.4.7, and 13.10.11.

Workarounds

No known workaround.

References

https://jira.xwiki.org/browse/XWIKI-20373

For more information

If you have any questions or comments about this advisory:

References

@tmortagne tmortagne published to xwiki/xwiki-platform Mar 1, 2023
Published by the National Vulnerability Database Mar 2, 2023
Published to the GitHub Advisory Database Mar 3, 2023
Reviewed Mar 3, 2023
Last updated Mar 3, 2023

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS score

0.102%
(43rd percentile)

Weaknesses

CVE ID

CVE-2023-26474

GHSA ID

GHSA-3738-p9x3-mv9r

Source code

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