Summary Authenticated non‑admin users can call /api/setup/backup and trigger a configuration backup. The endpoint only checks authentication, not authorization, and returns a link to the generated ZIP.

Details SetupController.php uses userIsAuthenticated() but does not verify that the requester has configuration/admin permissions. This allows any logged‑in user to create a sensitive backup and retrieve its path.

PoC Precondition: API enabled, any authenticated non‑admin user. - Log in as a non‑admin user. - Call backup endpoint. curl -c /tmp/pmfapicookies.txt \ -H 'Content-Type: application/json' \ -d '{"username":"tester","password":"Test1234!"}' \ http://192.168.40.16/phpmyfaq/api/v3.0/login

curl -i -b /tmp/pmfapicookies.txt \ -X POST --data '4.0.16' \ http://192.168.40.16/phpmyfaq/api/setup/backup

Impact Low‑privileged users can generate sensitive backups. If the ZIP is web‑accessible (server misconfiguration), this can lead to secret exposure.

Cross-site Scripting (XSS) - Reflected in GitHub repository thorsten/phpmyfaq prior to 3.1.9.

Cross-site Scripting (XSS) - Reflected in GitHub repository thorsten/phpmyfaq prior to 3.1.8.