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EUVD-2026-266584

2026-10-20T22:55:36.283543+00:00

EUVD-2026-266584

fkie_cve-2026-24421

2026-10-20T22:55:36.283574+00:00

phpMyFAQ is an open source FAQ web application. Versions 4.0.16 and below have flawed authorization logic which exposes the /api/setup/backup endpoint to any authenticated user despite their permissions. SetupController.php uses userIsAuthenticated() but does not verify that the requester has configuration/admin permissions. Non-admin users can trigger a configuration backup and retrieve its path. The endpoint only checks authentication, not authorization, and returns a link to the generated ZIP. This issue is fixed in version 4.0.17.

GHSA-wm8h-26fv-mg7g — phpMyFAQ: /api/setup/backup accessible to any authenticated user (authz missing)

2026-10-20T22:55:36.283605+00:00

Affected: Packagist: phpmyfaq/phpmyfaq, Packagist: thorsten/phpmyfaq

### 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/pmf_api_cookies.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/pmf_api_cookies.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.