GHSA-8c25-vj2w-p72j: TYPO3 Cross-Site Scripting in Frontend User Login

May 30, 2024

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

References

github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/2018-12-11-3.yaml
github.com/TYPO3-CMS/core
github.com/advisories/GHSA-8c25-vj2w-p72j
typo3.org/security/advisory/typo3-core-sa-2018-008

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