CVE-2021-47936CWE-306

CVE-2021-47936

Critical · published May 10, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
50.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00656 · 50.8th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-05-10T17:16Z
References (4)
https://www.opencats.org/ · [email protected]https://github.com/opencats/OpenCATS · [email protected]https://www.exploit-db.com/exploits/50585 · [email protected]https://www.vulncheck.com/advisories/opencats-remote-code-execution-via-resume-upload · [email protected]
EPSS history
Timeline
  • 10 MAY 12:43Z
    OpenCATS 0.9.4 Remote Code Execution via Resume Upload
    cvelistv5