Cross-Site Scripting in TYPO3's Frontend Login Mailer
Date: 2022-06
Affected: composer/typo3/cms, composer/typo3/cms, composer/typo3/cms-core
Attack vector: xss
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2022-31049
CWE: CWE-79
CVSS: 5.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N)

> ### Meta > * CVSS: `CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C` (4.9) ### Problem User submitted content was used without being properly encoded in HTML emails sent to users. The actually affected components were mail clients used to view those messages. ### Solution Update to TYPO3 versions 9.5.35 ELTS, 10.4.29, 11.5.11 that fix the problem described above. ### Credits Thanks to Christian Seifert who reported this issue and to TYPO3 framework merger Andreas Fernandez who fixed the issue. ### References * [TYPO3-CORE-SA-2022-004](https://typo3.org/security/advisory/typo3-core-sa-2022-004)


Mitigations:

Architectural layers (MAESTRO):