CVE-2026-65764 in Phoca Commander Extension
Summary
by MITRE • 07/27/2026
Joomla Extension - phoca.cz - Reflected XSS vulnerability in Phoca Commander 5.0.0-6.1.1 - Improper validation of user inputs lead to a reflective XSS vulnerability.
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Analysis
by VulDB Data Team • 07/27/2026
The Joomla extension Phoca Commander version 5.0.0 through 6.1.1 contains a reflected cross-site scripting vulnerability that stems from improper input validation mechanisms within the component's codebase. This vulnerability allows attackers to inject malicious scripts into web pages viewed by other users, creating a persistent threat vector that can be exploited across multiple sessions and user interactions. The flaw specifically manifests when the application fails to properly sanitize or escape user-supplied data before incorporating it into dynamic web content generation processes.
The technical implementation of this vulnerability occurs within the extension's parameter handling system where input values from HTTP request parameters are directly processed without adequate sanitization measures. Attackers can construct malicious URLs containing crafted script payloads that, when executed by a victim's browser, trigger unauthorized actions or data exfiltration attempts. The reflected nature of this vulnerability means that the malicious script code is reflected off the web server and executed in the victim's browser context, making it particularly dangerous for targeted attacks against authenticated users with administrative privileges.
This vulnerability poses significant operational risks to Joomla installations using affected Phoca Commander versions, as successful exploitation could enable attackers to hijack user sessions, steal sensitive authentication tokens, or perform unauthorized administrative actions. The impact extends beyond simple script execution since the vulnerability exists within a file management component that often requires elevated permissions, potentially allowing attackers to gain access to restricted system resources or modify critical application files. The vulnerability affects not only individual users but also entire Joomla installations where the extension is deployed, creating widespread potential for compromise.
Security practitioners should implement immediate mitigations including input validation and output encoding measures at the application level to prevent malicious data from being processed as executable code. The vulnerability aligns with CWE-79 which describes improper neutralization of input during web page generation, and maps to ATT&CK technique T1059.006 for scripting and T1566 for social engineering through malicious links. Organizations should prioritize updating to patched versions of Phoca Commander as soon as possible, while also implementing web application firewalls and content security policies to provide additional defense layers against exploitation attempts. Regular security audits of third-party extensions remain critical for identifying similar input validation flaws that could compromise overall system integrity and user data protection.