Freepbx
CVE-2026-28287
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate to FreePBX instance
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ExploitAccess recordings module
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ExecutionInject shell commands in recording parameters
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ImpactExecute arbitrary commands on server
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization OS command sanitization, avoid shell exec
MITRE ATT&CK
2 techniques across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | FreePBX versions 16.0.17.2–16.0.19 or 17.0.2.4–17.0.4 with recordings module enabled; authenticated user account with recordings module access required. |
| Impact | CVSS 8.8 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Unauthenticated command injection in FreePBX recordings module (versions 16.0.17.2-16.0.19 and 17.0.2.4-17.0.4) allows authenticated attackers to execute arbitrary system commands with full system privileges. The vulnerability stems from improper input validation in the recordings functionality, enabling complete compromise of affected FreePBX installations. No patch is currently available.
Earlier versions of this analysis (1)
FreePBX is an open source IP PBX. From versions 16.0.17.2 to before 16.0.20 and from version 17.0.2.4 to before 17.0.5, multiple command injection vulnerabilities exist in the recordings module. [CVSS 8.8 HIGH]
RemediationAI
Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-78 (OS Command Injection). Affects the recordings component of Freepbx. FreePBX is an open source IP PBX. From versions 16.0.17.2 to before 16.0.20 and from version 17.0.2.4 to before 17.0.5, multiple command injection vulnerabilities exist in the recordings module. This issue has been patched in versions 16.0.20 and 17.0.5.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
DescriptionGitHub Advisory
FreePBX is an open source IP PBX. From versions 16.0.17.2 to before 16.0.20 and from version 17.0.2.4 to before 17.0.5, multiple command injection vulnerabilities exist in the recordings module. This issue has been patched in versions 16.0.20 and 17.0.5.
Executive ViewAI
FreePBX installations (versions 16.0.17.2-16.0.19 and 17.0.2.4-17.0.4) contain critical command injection vulnerabilities in the recordings module that allow attackers to execute arbitrary commands on affected systems. Organizations running vulnerable versions face immediate risk of system compromise, data theft, and service disruption with no available patch.
Disable the recordings module in FreePBX if not critical to operations; implement network segmentation to restrict access to FreePBX to authorized personnel only; restrict administrative access via firewall rules and require VPN for remote administration; deploy WAF rules to filter suspicious input patterns targeting the recordings endpoint; enable comprehensive logging and monitoring for command execution attempts; implement strict input validation at the application layer if custom scripts are used; monitor for CVE-2026-28287 exploitation indicators including unexpected process execution and recording module API calls.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
OS command injection occurs when an application passes unsanitized user input directly into system shell commands.
Affected Products (CPE)GitHub Advisory
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Exploit-DB