Weblate is a web based localization tool. In versions prior to 5.15.1, it was possible to overwrite Git configuration remotely and override some of its behavior. Version 5.15.1 fixes the issue.
https://github.com/WeblateOrg/weblate/security/advisories/GHSA-8vcg-cfxj-p5m3
https://github.com/WeblateOrg/weblate/releases/tag/weblate-5.15.1
https://github.com/WeblateOrg/weblate/pull/17345
https://github.com/WeblateOrg/weblate/pull/17330
https://github.com/WeblateOrg/weblate/commit/dd8c9d7b00eebe28770fa0e2cd96126791765ea7
https://github.com/WeblateOrg/weblate/commit/4837a4154390f7c1d03c0e398aa6439dcfa361b4