{"id":"CVE-2021-32768","aliases":["BIT-typo3-2021-32768","GHSA-c5c9-8c6m-727v"],"url":"https://o3.security/vulnerability/CVE-2021-32768","summary":"Cross-Site Scripting via Rich-Text Content","details":"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.","published":"2021-08-10T17:15:10.587Z","modified":"2026-08-27T03:48:39.284540354Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Packagist","name":"typo3/cms-core","fixedVersion":"7.6.53"},{"ecosystem":"Packagist","name":"typo3/cms-core","fixedVersion":"8.7.42"},{"ecosystem":"Packagist","name":"typo3/cms-core","fixedVersion":"10.4.19"},{"ecosystem":"Packagist","name":"typo3/cms-core","fixedVersion":"11.3.2"},{"ecosystem":"Packagist","name":"typo3/cms-core","fixedVersion":"9.5.29"},{"ecosystem":"Packagist","name":"typo3/cms","fixedVersion":"10.4.19"},{"ecosystem":"Packagist","name":"typo3/cms","fixedVersion":"11.3.2"},{"ecosystem":"Packagist","name":"typo3/cms","fixedVersion":"9.5.29"},{"ecosystem":"Packagist","name":"typo3/cms","fixedVersion":"8.7.42"},{"ecosystem":"Packagist","name":"typo3/cms","fixedVersion":"7.6.53"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-c5c9-8c6m-727v"},{"type":"ADVISORY","url":"https://typo3.org/security/advisory/typo3-core-sa-2021-013"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-27T03:48:39.284540354Z"}}