CVE-2026-44237 — FreePBX: Authenticated Access can lead to Subsequent OAuth2 Authentication Bypass in API Module
FreePBX is an open source IP PBX. Prior to 17.0.8, the FreePBX api module's OAuth2 implementation does not sufficiently validate client credentials during token issuance. Knowle…
Published: 2026-05-29 · CVSS: 7.6 · CVSS 4.0
FreePBX is an open source IP PBX. Prior to 17.0.8, the FreePBX api module's OAuth2 implementation does not sufficiently validate client credentials during token issuance. Knowledge of a valid client_id is required. The validateClient() method in ClientRepository.php unconditionally returns true, allowing any party with knowledge of a valid client_id to obtain OAuth2 access tokens without providing the correct client_secret. This vulnerability is fixed in 17.0.8.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7