CVE-2021-47936
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk50th percentile - higher than 50% of all known CVEs
Summary
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.
Risk Assessment
An attacker can fully compromise the server, gaining access to data and the ability to further attack the infrastructure.
Recommendation
Immediately update to the latest version of OpenCATS and implement file type validation during uploads.
Other vulnerabilities in OpenCATS
See all- CVE-2026-27760High
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.
- 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 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. Attackers can upload PHP payloads through the careers job application endpoint and execute system commands via POST requests to the uploaded file in the upload directory.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS