CVE-2021-47936
OpenCATS 0.9.4 has a critical remote code execution flaw that lets anyone upload a PHP file disguised as a resume and run arbitrary commands on the server. The vulnerability is exploitable without authentication and can be triggered through the careers job application endpoint.
No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.
Who is affected
OpenCATS 0.9.4 – the open‑source applicant tracking system.
Real-world impact
An attacker can upload a malicious PHP file, then send a request to that file to execute any command on the server, potentially taking full control of the system.
Why this severity
The CVSS score of 9.3 reflects the combination of remote exploitation, lack of authentication, and the ability to execute arbitrary code with high impact on confidentiality, integrity, and availability.
What to do about it
No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.
No fix documented in sources
Timeline
- May 10, 2026 · May 10, 2026PublishedDisclosed and added to the National Vulnerability Database.
- Jul 25, 2026 · 11d agoAdvisory updatedThe NVD record was last revised.