FreePBX up to 16.0.10/17.0.3 missedcall module missedcallnotify.php sql injection

Summaryinfo

A vulnerability, which was classified as critical, was found in FreePBX up to 16.0.10/17.0.3. The impacted element is an unknown function of the file agi-bin/missedcallnotify.php of the component missedcall module. Executing a manipulation can lead to sql injection. This vulnerability is tracked as CVE-2026-73663. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in FreePBX up to 16.0.10/17.0.3 and classified as critical. This vulnerability affects some unknown functionality of the file agi-bin/missedcallnotify.php of the component missedcall module. The manipulation with an unknown input leads to a sql injection vulnerability. The CWE definition for the vulnerability is CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-73663 since 08/13/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1505 by the MITRE ATT&CK project.

By approaching the search of inurl:agi-bin/missedcallnotify.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 16.0.11 or 17.0.4 eliminates this vulnerability.

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Productinfo

Name

• FreePBX

Version

• 16.0.0
• 16.0.1
• 16.0.2
• 16.0.3
• 16.0.4
• 16.0.5
• 16.0.6
• 16.0.7
• 16.0.8
• 16.0.9
• 16.0.10
• 17.0.0
• 17.0.1
• 17.0.2
• 17.0.3

License

• open-source

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