CVE-2026-97160 in UP Plugin Extension
Summary
by MITRE • 09/26/2026
Joomla Extension - lomart.fr - Authenticated, privileged PHP command injection in UP plugin extension 5.0.0-5.2.0, 6.0.0-6.0.29
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Analysis
by VulDB Data Team • 09/26/2026
The vulnerability identified involves a critical authenticated and privilege-dependent PHP command injection flaw within the UP (Ultimate Portfolio) plugin for Joomla, specifically affecting versions ranging from 5.0.0 through 5.2.0 and 6.0.0 through 6.0.29. This security issue stems from insufficient sanitization of user-supplied input that is subsequently passed to PHP system execution functions without adequate validation or escaping mechanisms. As an authenticated attacker with privileged access, such as a site administrator or editor role depending on the specific configuration and permissions granted within the Joomla environment, it is possible to inject arbitrary operating system commands into the application context. The root cause lies in the improper handling of parameters related to portfolio item configurations or media uploads where shell metacharacters are not filtered out before being processed by backend scripts that invoke external binaries or command-line utilities via functions such as exec, passthru, shell_exec, or system.
From a technical perspective, this flaw represents a classic instance of OS Command Injection, categorized under CWE-78 in the Common Weakness Enumeration standard. The vulnerability allows an attacker to bypass intended application logic by exploiting the direct execution capabilities provided by the underlying web server environment and PHP configuration. Since the attack requires authentication and elevated privileges, it is often classified as an insider threat or a consequence of compromised administrative credentials rather than an unauthenticated remote code execution vector. However, once authenticated access is achieved through credential theft, phishing, or privilege escalation from lower-level vulnerabilities, the impact escalates to full system compromise. The attacker can execute commands with the same privileges as the web server process, which typically runs under a dedicated user account but may have sufficient permissions to read sensitive files, modify application data, or pivot further into the internal network infrastructure.
The operational impact of this vulnerability is severe due to its potential for complete control over the hosting environment. An attacker leveraging this command injection can exfiltrate database credentials stored in configuration files such as configuration.php, access private user data including personal identifiable information and financial records if present, or install persistent backdoors like web shells for long-term access. Furthermore, depending on the server's security posture, the compromised account might allow lateral movement to other services running on the same host, potentially leading to a broader infrastructure breach. This aligns with the MITRE ATT&CK framework technique T1059, specifically sub-techniques related to command and script interpreters like Command Line Interface or Unix Shell, which describe how adversaries use native operating system utilities to execute malicious commands during post-exploitation phases.
Mitigation strategies must address both immediate remediation and long-term security hardening. The primary recommendation is to upgrade the UP plugin extension immediately to a version that has patched this vulnerability, ensuring that all instances of Joomla across the organization are updated consistently. If upgrading is not feasible in the short term, administrators should restrict access to the affected components by modifying file permissions or using web application firewall rules to block requests containing common shell metacharacters such as semicolons, pipes, and backticks within parameters associated with portfolio management features. Additionally, implementing strict input validation on all user-supplied data before it reaches any system execution function is essential. Developers should avoid passing unsanitized variables directly to command-line functions; instead, they should use language-specific APIs that do not invoke the shell or ensure rigorous escaping using appropriate library functions like escapeshellarg and escapeshellcmd in PHP environments. Regular security audits and code reviews focusing on external interaction points will help prevent similar injection flaws from being introduced into future versions of extensions or custom modules within the Joomla ecosystem.