CVE-2026-66493 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 for delete, copy and move actions lead to path traversal vulnerabilities.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
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 affects the delete, copy, and move functionality within the file management system. This vulnerability stems from improper input validation and sanitization of user-supplied paths, allowing malicious actors to manipulate file operations beyond the intended directory boundaries. The flaw exists in the core file handling mechanisms where the application fails to properly restrict file system access based on user permissions or predefined safe directories.
This path traversal vulnerability falls under CWE-22 - Improper Limitation of a Pathname to a Restricted Directory, which is classified as a serious security weakness in software applications that handle file operations. The vulnerability allows attackers to traverse the file system hierarchy by manipulating parameters used in delete, copy, and move actions, potentially enabling them to access, modify, or delete files outside of the designated application directories. When exploited, this flaw can lead to unauthorized data access, file corruption, or complete system compromise depending on the permissions granted to the web application.
The operational impact of this vulnerability extends beyond simple file manipulation as it provides attackers with a potential foothold for further exploitation within the Joomla environment. An attacker could leverage this vulnerability to access sensitive configuration files, database credentials, or other critical system components that are typically protected by proper directory restrictions. The vulnerability affects all versions from 1.0.0 through 6.1.3, indicating a long-standing issue that was not properly addressed in the software development lifecycle.
Security frameworks such as MITRE ATT&CK categorize this type of vulnerability under T1059 - Command and Scripting Interpreter and T1078 - Valid Accounts, as attackers can use path traversal to escalate privileges or gain access to additional system resources. The vulnerability also aligns with the OWASP Top Ten 2021 category A01:2021 - Broken Access Control, since it represents a failure in proper access control mechanisms that should prevent unauthorized file system operations.
Mitigation strategies should focus on immediate patching of affected versions and implementing proper input validation for all file operation parameters. Organizations should ensure that all user-supplied paths are properly sanitized and validated against a whitelist of acceptable directories. The recommended approach includes implementing strict path validation that ensures all file operations occur within designated safe directories and that absolute paths are resolved to relative paths before processing. Additionally, the principle of least privilege should be enforced where the web application operates with minimal necessary permissions, preventing access to system-critical files even if traversal occurs.
Security monitoring should include detection of unusual file operations patterns and anomalous path traversal attempts. Network intrusion detection systems can be configured to flag suspicious parameter values in file management requests. Regular security audits of third-party extensions are essential for maintaining overall system security posture, as this vulnerability demonstrates the importance of proper input validation and access control implementation in web applications. The fix should include comprehensive testing of all file operation functions to ensure that path traversal attempts are properly rejected while maintaining legitimate functionality for authorized users.