CVE-2026-66492 in Commander Extension
Summary
by MITRE • 08/07/2026
Joomla Extension - phoca.cz - Path Traversal vulnerability in Phoca Commander 1.0.0-6.1.3 - Improper limitation of paths in the file upload action lead to path a traversal vulnerability.
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Analysis
by VulDB Data Team • 08/07/2026
The Joomla extension Phoca Commander version 1.0.0 through 6.1.3 contains a critical path traversal vulnerability that stems from improper input validation during file upload operations. This flaw allows authenticated attackers with appropriate privileges to manipulate file paths and potentially access or modify files outside the intended directory structure. The vulnerability specifically affects the file upload functionality where user-supplied path data is not properly sanitized or validated before being processed by the application's file handling mechanisms.
This security weakness manifests as an improper limitation of paths within the Phoca Commander component, creating a condition where attackers can manipulate file system operations through carefully crafted input sequences. The vulnerability falls under the Common Weakness Enumeration category CWE-23, which describes improper limitation of a path traversal or path traversal attack that allows access to files outside the intended directory scope. The flaw essentially bypasses normal file system access controls by exploiting insufficient validation of user-provided paths during upload operations.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it can potentially enable attackers to execute arbitrary code on the affected Joomla installation. An authenticated attacker with access to the Phoca Commander component could leverage this path traversal flaw to upload malicious files to sensitive directories, potentially leading to complete system compromise. The vulnerability affects not just file reading capabilities but also file writing operations that could result in remote code execution or data corruption within the web application environment.
Security professionals should note that this vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as it may enable attackers to execute malicious payloads through compromised file upload mechanisms. The attack surface is particularly concerning in environments where Joomla installations are configured with elevated privileges or where the Phoca Commander extension is widely deployed across multiple sites. Organizations using affected versions should immediately implement mitigations including input sanitization of all file path parameters and restriction of file upload capabilities to prevent exploitation.
Mitigation strategies should focus on implementing strict input validation for all file path operations within the Phoca Commander component, including normalization of file paths and enforcement of directory restrictions. System administrators should ensure that the extension is updated to the latest version where this vulnerability has been patched, as vendors typically address such issues through proper parameter sanitization and access control mechanisms. Additionally, implementing web application firewalls with rules specifically targeting path traversal patterns can provide additional defense in depth layers against exploitation attempts.