CVE-2026-28284 in FreePBX
Summary
by MITRE • 03/05/2026
FreePBX is an open source IP PBX. Prior to versions 16.0.10 and 17.0.5, the FreePBX logfiles module contains several authenticated SQL injection vulnerabilities. This issue has been patched in versions 16.0.10 and 17.0.5.
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Analysis
by VulDB Data Team • 03/07/2026
The vulnerability identified as CVE-2026-28284 affects FreePBX, an open source IP PBX system widely deployed in enterprise communications environments. This issue resides within the logfiles module of FreePBX, representing a critical security weakness that has existed in versions prior to 16.0.10 and 17.0.5. The affected system represents a cornerstone component in many organizations' telephony infrastructure, making this vulnerability particularly concerning from a cybersecurity perspective. FreePBX serves as a web-based interface for managing Asterisk PBX systems, handling everything from call routing to user management, which makes it a prime target for attackers seeking persistent access to network communications infrastructure.
The technical flaw manifests as authenticated SQL injection vulnerabilities within the logfiles module, which operates under CWE-89, specifically categorized as SQL injection. This vulnerability requires an authenticated user context to exploit, meaning attackers must first obtain valid credentials to the FreePBX system. However, once authenticated, the attacker can manipulate database queries through malicious input in the logfiles module, potentially allowing them to execute arbitrary SQL commands. The authenticated nature of this vulnerability means that even a low-privilege user account could potentially leverage this weakness to escalate privileges or access sensitive database information. The exploitation process typically involves crafting malicious input parameters that bypass normal input validation mechanisms, allowing the attacker to inject SQL code directly into database queries.
The operational impact of this vulnerability extends beyond simple data theft or system disruption. Organizations relying on FreePBX for their communications infrastructure face significant risks including unauthorized access to call logs, user credentials, system configurations, and potentially sensitive business communications data. Attackers could leverage this vulnerability to gain insights into network traffic patterns, user behavior, and system architecture, which could facilitate further attacks within the organization's network. The vulnerability also presents a risk of data integrity compromise, where attackers could modify or delete critical log entries, potentially masking their activities or causing system instability. Given that FreePBX systems often serve as central communication hubs, the potential for business disruption and regulatory compliance violations makes this vulnerability particularly severe in enterprise environments.
Mitigation strategies for CVE-2026-28284 require immediate action to upgrade affected FreePBX installations to versions 16.0.10 or 17.0.5, which contain the necessary patches to address the SQL injection vulnerabilities. Organizations should implement comprehensive access controls and privilege management to limit the number of users with access to the logfiles module, reducing the attack surface. Network segmentation and monitoring of database access patterns can help detect anomalous behavior that might indicate exploitation attempts. Additionally, implementing web application firewalls and input validation controls can provide additional defense in depth. The vulnerability aligns with ATT&CK technique T1190, which covers exploitation of remote services, and T1078, which covers valid accounts for persistence. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other components of the communications infrastructure, as this type of authenticated SQL injection vulnerability can potentially exist in other modules or components of the FreePBX system or related applications.