Vulnerability Analysis
FreePBX UCP: Unauthenticated remote code execution via socket.io namespace auth bypass and AMI action injection
CVE-2026-73665
FreePBX is an open source IP PBX. Prior to 17.0.9, the UCP Node server on ports 8001 and 8003 uses io.use(checkAuth) in node/lib/server.js, but Socket.IO version 4 applies that middleware only to the default namespace. An unauthenticated client can connect to custom namespaces that do not consistently invoke checkAuth in node/lib/auth.js and send crafted event values containing carriage-return or newline characters through the Asterisk Manager Interface action path patched by node/lib/asterisk-manager-patch.js, allowing arbitrary commands to execute as the asterisk service user. This issue is fixed in version 17.0.9.
No Active Exploit Signals
CVSS Base Score
9.3
CRITICAL
Exploitability:-
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EPSS:-
Threat Intelligence Signals
CISA KEV
No
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Ransomware Use
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VulnCheck In-the-Wild
No
Nuclei Template
No
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GitHub Severity
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SSVC Exploitation
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SSVC Automatable
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Identity & Timeline
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| Time to Patch (Days to fix) | - |
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| Exploit DB References | None identified |
Affected Products & Versions
| Vendor | Product | Affected Versions |
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| No affected products specified. | ||
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