Cross-Site Scripting in Backend Grid View

MOYENNE 5.4CVE-2021-32669 · BIT-typo3-2021-32669 · GHSA-rgcg-28xm-8mmw · Published 20/07/2021 · updated 17/06/2026

En bref

CVE-2021-32669 est une vulnérabilité MOYENNE (CVSS 5.4) touchant typo3/cms, typo3/cms-core, typo3 (typo3).
Probabilité d'exploitation dans les 30 prochains jours (EPSS) : 0.60%, plus élevée que 48.8% des vulnérabilités.
Correctif : mettre à jour vers 10.4.18, 11.3.1, 9.5.28, 8.7.41 ou plus récent.

Package	Affected versions	Patched versions
typo3/cms Packagist	`≥ 10.0.0, < 10.4.18≥ 11.0.0, < 11.3.1≥ 9.0.0, < 9.5.28`	`10.4.1811.3.19.5.28`
typo3/cms-core Packagist	`≥ 10.0.0, < 10.4.18≥ 11.0.0, < 11.3.1≥ 8.0.0, < 8.7.41≥ 9.0.0, < 9.5.28`	`10.4.1811.3.18.7.419.5.28`
typo3 typo3	`≥ 10.0.0, ≤ 10.4.17≥ 11.0.0, ≤ 11.3.0≥ 8.0.0, ≤ 8.7.40≥ 9.0.0, ≤ 9.5.28`	No fix yet

Description

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.

NVD description

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.