fixed several security issues #3006

Job	Run time
Coding Guidelines Check	26s
FE asset formatting check	19s
PHPMD	11s
FE Asset Linting	19s
Run frontend unit- and functional-tests	52s
Static Code Analysis	30s
Run frontend type check	27s
Build Docker Images	1m 36s
Build Development Docker Images	2m 19s
Run backend unit- and functional-tests	1m 22s
Run E2E-tests via Cypress (1)	4m 18s
Run E2E-tests via Cypress (2)	4m 3s
Run E2E-tests via Cypress (3)	3m 48s
Run E2E-tests via Cypress (4)	4m 29s
Publish	0s
Scan vulnerabilities	0s
Deploy and notify	0s
	24m 59s

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