CVE-2021-21358

TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 10.4.14, 11.1.1 it has been discovered that the Form Designer backend module of the Form Framework is vulnerable to cross-site scripting. A valid backend user account with access to the form module is needed to exploit this vulnerability. This is fixed in versions 10.4.14, 11.1.1.

• CWE-79

• https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-x79j-wgqv-g8h2Third Party Advisory
• https://packagist.org/packages/typo3/cms-formRelease Notes, Third Party Advisory
• https://typo3.org/security/advisory/typo3-core-sa-2021-004Vendor Advisory
• https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-x79j-wgqv-g8h2Third Party Advisory
• https://packagist.org/packages/typo3/cms-formRelease Notes, Third Party Advisory
• https://typo3.org/security/advisory/typo3-core-sa-2021-004Vendor Advisory

Published

Mar 23, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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