Description
TYPO3 is an open source web content management system. Prior to versions 9.5.34 ELTS, 10.4.29, and 11.5.11, 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. TYPO3 versions 9.5.34 ELTS, 10.4.29, and 11.5.11 contain a fix for the problem.
Remediation
References
Related Vulnerabilities
WordPress Plugin iThemes Security (formerly Better WP Security) Security Bypass (7.9.0)
PHP Out-of-bounds Write Vulnerability (CVE-2017-9228)
MODX Improper Restriction of XML External Entity Reference Vulnerability (CVE-2020-25911)
Jenkins Deserialization of Untrusted Data Vulnerability (CVE-2015-8103)