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FreePBX CVE-2026-73663

| EUVDEUVD-2026-58486 CRITICAL
SQL Injection (CWE-89)
2026-08-13 GitHub_M
SQLi PHP Missedcall
9.3
CVSS 4.0 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
9.3 CRITICAL
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
9.8 CRITICAL

Unauthenticated remote caller controls the SIP From name reaching the SQL sink (AV:N/PR:N/UI:N); low complexity as no special evasion is needed, and SQLi yields full DB read/write leading to admin takeover (C/I/A:H).

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

4
Patch available
Aug 13, 2026 - 22:19 EUVD
Source Code Evidence Fetched
Aug 13, 2026 - 22:05 vuln.today
Analysis Generated
Aug 13, 2026 - 22:05 vuln.today
CVE Published
Aug 13, 2026 - 21:29 cve.org
CRITICAL 9.3

DescriptionCVE.org

FreePBX is an open source IP PBX. From 16.0.0 until 16.0.11 and 17.0.4, the FreePBX missedcall module places the inbound Caller ID name from crafted SIP From headers into the missedcalllog INSERT in agi-bin/missedcallnotify.php without escaping or bound parameters. An unauthenticated caller can inject SQL when a monitored extension goes unanswered, corrupting the database and modifying FreePBX administrator accounts to obtain unauthorized remote access. This issue is fixed in versions 16.0.11 and 17.0.4.

AnalysisAI

SQL injection in the FreePBX missedcall module (versions 16.0.0 through 16.0.10 and 17.0.0 through 17.0.3) lets an unauthenticated caller inject SQL via a crafted SIP From-header Caller ID name that is written unescaped into the missedcalllog INSERT in agi-bin/missedcallnotify.php. When a monitored extension goes unanswered, the injected payload executes against the FreePBX database, enabling corruption of records and modification of administrator accounts to gain unauthorized remote admin access. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Place inbound SIP call with malicious Caller ID name
Delivery
Let call ring monitored extension unanswered
Exploit
missedcallnotify.php builds unescaped INSERT
Execution
Injected SQL executes on FreePBX database
Persist
Modify administrator account record
Impact
Log in and seize PBX control
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the FreePBX 'missedcall' module be installed and that the target system can receive an inbound SIP call which reaches a monitored extension; the attacker must control the Caller ID name (SIP From-header display name), which is trivial to spoof on many SIP trunks. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a genuine high-priority issue rather than an inflated high-CVSS score. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker places an inbound SIP call to the target FreePBX system with a maliciously crafted Caller ID name (SIP From display name) containing SQL syntax, and lets the call ring a monitored extension until it goes unanswered. When missedcallnotify.php logs the missed call, the injected SQL executes against the FreePBX database, allowing the attacker to modify an administrator account and subsequently log into the web GUI for full control. …
Remediation Vendor-released patch: upgrade the FreePBX missedcall module to version 16.0.11 (for the 16.x branch) or 17.0.4 (for the 17.x branch), which replace the vulnerable string-concatenated INSERT with a parameterized prepared statement; the fixes are in commits https://github.com/FreePBX/missedcall/commit/4ada1d6b280fc246e74babc8d52f4cd1509eff24 and https://github.com/FreePBX/missedcall/commit/710acdf51968db507b3f9c47ce3db006846cf44c, and the advisory is at https://github.com/FreePBX/security-reporting/security/advisories/GHSA-g27h-xf3q-h3rm. … Detailed patch versions, workarounds, and compensating controls in full report.
Sign in to read full assessment

Recommended ActionAI

Within 24 hours: Identify all FreePBX instances running versions 16.0.0-16.0.10 or 17.0.0-17.0.3 and document their SIP exposure. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-73663 vulnerability details – vuln.today
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