CVE-2021-47936

critical

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.

References

https://www.vulncheck.com/advisories/opencats-remote-code-execution-via-resume-upload

https://www.opencats.org/

https://www.exploit-db.com/exploits/50585

https://github.com/opencats/OpenCATS

Details

Source: Mitre, NVD

Published: 2026-05-10

Updated: 2026-05-10

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical