chore(deps): [security] bump typo3/cms-backend from 9.5.20 to 9.5.27

[dependabot-preview]

Bumps typo3/cms-backend from 9.5.20 to 9.5.27. This update includes a security fix.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

Cross-Site Scripting in Content Preview (CType menu) > ### Meta > * CVSS: AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C (4.1) > * CWE-79 > * Status: DRAFT

Problem

It has been discovered that content elements of type menu are vulnerable to cross-site scripting when their referenced items get previewed in the page module. A valid backend user account is needed to exploit this vulnerability.

Solution

Update to TYPO3 versions 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 that fix the problem described.

Credits

Thanks to TYPO3 contributor Oliver Bartsch who reported and fixed the issue.

References

• TYPO3-CORE-SA-2021-008

Affected versions: >= 9.0.0, <= 9.5.24

Commits

• 1ffdb38 [RELEASE] Release of TYPO3 9.5.27
• 53997d1 [BUGFIX] Respect default values in TcaGroup
• cdc01a5 [BUGFIX] Allow "copy" action even if the user does not have "edit" permission
• ebb6b52 [TASK] Set TYPO3 version to 9.5.27-dev
• b7f1a9c [RELEASE] Release of TYPO3 9.5.26
• 4542640 [TASK] Set TYPO3 version to 9.5.26-dev
• de7a763 [RELEASE] Release of TYPO3 9.5.25
• bdf7486 [SECURITY] Mitigate XSS in PreviewRenderer for menus
• d76756f [TASK] Set TYPO3 version to 9.5.25-dev
• 4ada61b [RELEASE] Release of TYPO3 9.5.24
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #489.