CVE-2021-32768: 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 released under the GNU GPL. In affected versions failing to properly parse, sanitize and encode malicious rich-text content, the content rendering process in the website frontend is vulnerable to cross-site scripting. Corresponding rendering instructions via TypoScript functionality HTMLparser does not consider all potentially malicious HTML tag & attribute combinations per default. In default scenarios, a valid backend user account is needed to exploit this vulnerability. In case custom plugins used in the website frontend accept and reflect rich-text content submitted by users, no authentication is required. Update to TYPO3 versions 7.6.53 ELTS, 8.7.42 ELTS, 9.5.29, 10.4.19, 11.3.2 that fix the problem described.

Affected products

• TYPO3 TYPO3: from 7.0.0, up to and including 7.6.52; from 8.0.0, up to and including 8.7.41; from 9.0.0, up to and including 9.5.28; from 10.0.0, up to and including 10.4.18; from 11.0.0, up to and including 11.3.1

Published 2021-08-10. Last modified 2026-06-17.