GHSA-2rcw-9hrm-8q7q TYPO3 Cross-Site Scripting in Frontend User Login

• Packagist typo3/cms: >= 7.0.0, < 7.6.32 → fixed in 7.6.32 • Packagist typo3/cms: >= 8.0.0, < 8.7.21 → fixed in 8.7.21 • Packagist typo3/cms: >= 9.0.0, < 9.5.2 → fixed in 9.5.2

Failing to properly encode user input, login status display is vulnerable to cross-site scripting in the website frontend. A valid user account is needed in order to exploit this vulnerability - either a backend user or a frontend user having the possibility to modify their user profile. Template patterns that are affected are • ###FEUSER_[fieldName]### using system extension felogin • for regular frontend rendering (pattern can be defined individually using TypoScript setting config.USERNAME_substToken)