CVE-2025-57819
Sangoma FreePBX Authentication Bypass Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 19 September 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
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.
- CVSS 4.0
- 10.0 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 85.46% probability · 100th percentile
- CISA KEV
- Listed 29 August 2025 · due 19 September 2025
- Weakness
- CWE-89, CWE-288
- Affected
- sangoma/freepbx
- Source
- security-advisories@github.com
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://github.com/FreePBX/security-reporting/security/advisories/GHSA-m42g-xg4c-5f3h ; https://nvd.nist.gov/vuln/detail/CVE-2025-57819
References
- https://community.freepbx.org/t/security-advisory-please-lock-down-your-administrator-access/107203Issue Tracking, Vendor Advisory
- https://github.com/FreePBX/security-reporting/security/advisories/GHSA-m42g-xg4c-5f3hMitigation, Vendor Advisory
- https://github.com/watchtowrlabs/watchTowr-vs-FreePBX-CVE-2025-57819Exploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-57819US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.