CVE-2021-47936 OpenCATS 0.9.4 Remote Code Execution via Resume Upload
Unauthenticated attackers can execute arbitrary code by uploading malicious PHP files via the resume upload feature in OpenCATS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-47936?
CVE-2021-47936 is a critical vulnerability in OpenCATS, published on 10 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-306
Which versions are affected by CVE-2021-47936?
How do I fix CVE-2021-47936?
No fix has been published for CVE-2021-47936 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-47936 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47936 exists.
Sources
Also known as GHSA-6w77-cp2c-mfxq.