CVE-2021-21370: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

March 23, 2021 (updated March 24, 2021)

TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 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. This is fixed in versions 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1.

References

github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-x7hc-x7fm-f7qh
github.com/advisories/GHSA-x7hc-x7fm-f7qh
nvd.nist.gov/vuln/detail/CVE-2021-21370
packagist.org/packages/typo3/cms-backend
typo3.org/security/advisory/typo3-core-sa-2021-008

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