# CVE-2025-57819: Sangoma FreePBX Authentication Bypass Vulnerability

- Exploited (CISA KEV): yes, added 2025-08-29
- Published: 2025-08-28
- CVSS: 10 CRITICAL (v4.0)
- EPSS: 95.2% (100th percentile)
- CWE: CWE-89, CWE-288

FreePBX is an open-source web-based graphical user interface. FreePBX 15, 16, and 17 endpoints are vulnerable due to insufficiently sanitized user-supplied data allowing unauthenticated access to FreePBX Administrator leading to arbitrary database manipulation and remote code execution. This issue has been patched in endpoint versions 15.0.66, 16.0.89, and 17.0.3.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | No public claim | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2025-12-03 | 97 |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### F5

- 2025-12-03 · new · rule 200013135
  > Added: signature 200013135 "FreePBX Authentication Bypass" (Authentication/Authorization Attacks, risk High), systems: PHP. References: CVE-2025-57819.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

## Our test (measured)

- OWASP Core Rule Set 4.25.0, paranoia level 1, anomaly threshold 5, default CRS settings: partial (3 of 4 requests blocked), template CVE-2025-57819, 2026-11-02
- OWASP Core Rule Set 4.25.0, paranoia level 2, anomaly threshold 5, default CRS settings: partial (3 of 4 requests blocked), template CVE-2025-57819, 2026-11-02

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2025-57819 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2025-57819