CVE•Published 2025-12-09•Modified 2026-09-25•1 article on news•5 live references•NVD data
CVE-2025-66039Sangoma · Freepbx
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
88
Exploit Prediction Scoring System · top 12% of all CVEs
Weaknesses (CWE)
Description
FreePBX Endpoint Manager is a module for managing telephony endpoints in FreePBX systems. Versions are vulnerable to authentication bypass when the authentication type is set to "webserver." When providing an Authorization header with an arbitrary value, a session is associated with the target user regardless of valid credentials. This issue is fixed in versions 16.0.44 and 17.0.23.
Timeline
Published 2025-12-09
Modified 2026-09-25
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2025-66039Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Sangoma Freepbx"All exposed Sangoma Freepbx instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Freepbx"HTTP body or banner mentions "Freepbx" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2025-66039Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2025-66039Censys host search filtered to this CVE id.
grep.app
CVE-2025-66039Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2025-66039GitHub code search for direct mentions.
Google dork
"CVE-2025-66039" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2025-66039 on GitHub.