CVE-2026-27760
HighCVSS 8.1Exploitation Probability (EPSS)
Very high risk97th percentile - higher than 97% of all known CVEs
Summary
OpenCATS prior to commit 3002a29 contains a PHP code injection vulnerability in the installer AJAX endpoint that allows unauthenticated attackers to execute arbitrary code by injecting PHP statements into the databaseConnectivity action parameter. Attackers can break out of the define() string context in config.php using a single quote and statement separator to inject malicious PHP code that persists and executes on every subsequent page load when the installation wizard remains incomplete.
Risk Assessment
The risk for the organization includes full server compromise by an unauthenticated attacker, potentially leading to data theft, backdoor installation, or further attacks using the server.
Recommendation
Immediately update OpenCATS to commit 3002a29 or later, and if the installation is incomplete, restrict access to the installer directory from external sources.
Original NVD description (English source)
OpenCATS prior to commit 3002a29 contains a PHP code injection vulnerability in the installer AJAX endpoint that allows unauthenticated attackers to execute arbitrary code by injecting PHP statements into the databaseConnectivity action parameter. Attackers can break out of the define() string context in config.php using a single quote and statement separator to inject malicious PHP code that persists and executes on every subsequent page load when the installation wizard remains incomplete.