CVE-2026-58409
CriticalCVSS 9.1Exploitation Probability (EPSS)
Low risk37th percentile - higher than 37% of all known CVEs
Summary
In ChurchCRM prior to version 7.4.0, an authenticated administrator can achieve Remote Code Execution (RCE) on the server by installing a malicious plugin ZIP archive containing a PHP webshell. The application explicitly includes 'php' in its ALLOWED_EXTENSIONS list, while the dangerous extensions denylist fails to block standard .php files, allowing direct code execution via HTTP after extraction in the web root.
Risk Assessment
The risk for the organization is the potential for full server compromise by an administrator who can install a malicious plugin from an external source, leading to remote code execution and possible data loss or system control.
Recommendation
It is recommended to immediately upgrade ChurchCRM to version 7.4.0 or later, which includes a fix for this vulnerability. Additionally, restrict access to the plugin installation API to trusted sources only.
Original NVD description (English source)
ChurchCRM is an open-source church management system. Prior to version 7.4.0, an authenticated administrator can achieve Remote Code Execution (RCE) on the server by installing a malicious plugin ZIP archive containing a PHP webshell. The application explicitly includes 'php' in its ALLOWED_EXTENSIONS list, while the dangerous extensions denylist (DENIED_EXTENSIONS) fails to block standard .php files. Because `php` is explicitly included in the allowed extension list for plugin archives, and extracted files are placed directly under the web root, any PHP file inside the ZIP becomes immediately executable via HTTP — without even needing to "enable" the plugin through the application UI. The /plugins/install-url API route (management.php) allows an administrator to source the malicious ZIP from any attacker-controlled HTTPS URL, validating it only against an attacker-supplied SHA-256 hash. This issue has been fixed in version 7.4.0.