CVE-2025-57819: Sangoma FreePBX Authentication Bypass Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 29 Aug 2025, 1 day after the CVE record was published.

How likely is exploitation in the next 30 days?

95.2%

EPSS score, percentile 99.9 of all scored records

How severe?

10.0 Critical

CVSS v4.0 base score, given by the CNA

What should I do?

CISA deadline 19 Sep 2025. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

• < 15.0.66
• < 16.0.89
• < 17.0.3

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

CISA due date for this action: 19 September 2025.

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

• https://github.com/FreePBX/security-reporting/security/advisories/GHSA-m42g-xg4c-5f3h
• https://nvd.nist.gov/vuln/detail/CVE-2025-57819

Affected products and versions

As listed in the CVE record.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Sangoma FreePBX contains an authentication bypass vulnerability due to insufficiently sanitized user-supplied data allows unauthenticated access to FreePBX Administrator leading to arbitrary database manipulation and remote code execution.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

• CISA added CVE-2025-57819 to its Known Exploited Vulnerabilities (KEV) catalog on 29 Aug 2025.
• CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
• The due date CISA sets for the required action is 19 Sep 2025.
• The CVE record was published on 28 Aug 2025, 1 day before it was added to KEV.
• The CVE record carries a CVSS v4.0 base score of 10.0 (Critical), given by its CNA.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 95.2% (percentile 99.9), as of 28 Oct 2026.
• CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

FreePBX Affected by Authentication Bypass Leading to SQL Injection and RCE

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.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

• CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
• CWE-288: Authentication Bypass Using an Alternate Path or Channel

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

References

• https://github.com/FreePBX/security-reporting/security/advisories/GHSA-m42g-xg4c-5f3h
• https://community.freepbx.org/t/security-advisory-please-lock-down-your-administrator-access/107203

More exploited Sangoma vulnerabilities

• CVE-2026-9586: Sangoma Switchvox SQL Injection Vulnerability (added 2 Sep 2026)
• CVE-2019-19006: Sangoma FreePBX Improper Authentication Vulnerability (added 3 Feb 2026)
• CVE-2025-64328: Sangoma FreePBX OS Command Injection Vulnerability (added 3 Feb 2026)