CVE-2020-26227: TYPO3

Medium severity, CVSS 6.1. EPSS: 0.7% chance of exploitation in the next 30 days.

TYPO3 is an open source PHP based web content management system. In TYPO3 before versions 9.5.23 and 10.4.10 the system extension Fluid (typo3/cms-fluid) of the TYPO3 core is vulnerable to cross-site scripting passing user-controlled data as argument to Fluid view helpers. Update to TYPO3 versions 9.5.23 or 10.4.10 that fix the problem described.

Affected products

• TYPO3 TYPO3: from 6.2.0, before 6.2.54 (fixed in 6.2.54); from 7.6.0, before 7.6.48 (fixed in 7.6.48); from 8.7.0, before 8.7.38 (fixed in 8.7.38); from 9.0.0, before 9.5.23 (fixed in 9.5.23); from 10.0.0, before 10.4.10 (fixed in 10.4.10)

Published 2020-11-23. Last modified 2026-06-17.