CVE-2021-32669: Cross-Site Scripting in Backend Grid View
Problem Failing to properly encode settings for backend layouts, the corresponding grid view is vulnerable to persistent cross-site scripting. A valid backend user account is needed to exploit this vulnerability.
Solution Update to TYPO3 versions 8.7.41 ELTS, 9.5.28, 10.4.18, 11.3.1 that fix the problem described.
Credits Thanks to TYPO3 core merger Oliver Bartsch who reported and fixed the issue.
Other sources
TYPO3 is an open source PHP based web content management system. Versions 9.0.0 through 9.5.28, 10.0.0 through 10.4.17, and 11.0.0 through 11.3.0 have a cross-site scripting vulnerability. When settings for backend layouts are not properly encoded, the corresponding grid view is vulnerable to persistent cross-site scripting. A valid backend user account is needed to exploit this vulnerability. TYPO3 versions 9.5.29, 10.4.18, 11.3.1 contain a patch for this vulnerability.
TYPO3-CORE-SA-2021-011: Cross-Site Scripting in Backend Grid View
Affected Software
Event History
Frequently Asked Questions
What is TYPO3-CORE-SA-2021-011?
TYPO3-CORE-SA-2021-011 is a cross-site scripting vulnerability in TYPO3, a PHP-based web content management system.
Which versions of TYPO3 are affected by TYPO3-CORE-SA-2021-011?
Versions 9.0.0 through 9.5.28, 10.0.0 through 10.4.17, and 11.0.0 through 11.3.0 of TYPO3 are affected by TYPO3-CORE-SA-2021-011.
How severe is TYPO3-CORE-SA-2021-011?
TYPO3-CORE-SA-2021-011 has a severity rating of 5.4 (medium).
What is the Common Weakness Enumeration (CWE) ID for TYPO3-CORE-SA-2021-011?
The CWE ID for TYPO3-CORE-SA-2021-011 is CWE-79.
Where can I find more information about TYPO3-CORE-SA-2021-011?
More information about TYPO3-CORE-SA-2021-011 can be found at the TYPO3 security advisory page (https://typo3.org/security/advisory/typo3-core-sa-2021-011) and the GitHub security advisories page (https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-rgcg-28xm-8mmw).