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.
Other vulnerabilities in OpenCATS
See all- CVE-2021-47936Critical
OpenCATS 0.9.4 contains a remote code execution vulnerability that allows unauthenticated attackers to execute arbitrary commands by uploading malicious PHP files disguised as resume attachments.
- CVE-2026-49490High
OpenCATS from version 0.9.1a contains an SQL injection vulnerability in DataGrid filter handling that allows authenticated attackers to inject SQL through crafted filters targeting the non-filterable Tags column in the Candidates DataGrid. Attackers can bypass column filterable restrictions by manipulating filter requests to execute arbitrary SQL queries against the database.
- CVE-2026-49489High
OpenCATS up to version 0.9.7.4 contains an SQL injection vulnerability in the sortDirection parameter of the DataGrid component. Authenticated users can inject malicious SQL via the sortDirection parameter in ajax/getDataGridPager.php to perform time-based blind injection attacks and extract sensitive database contents.
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.