P4Verified

CVE-2021-47936: OpenCATS 0 through 0.9.4

CVE-2021-47936. CVSS 3.1 base score 9.8 (CRITICAL, Vendor/CNA). EPSS 0.00656 (percentile 0.49675), scored 2026-10-05.

Affected technology

OpenCATS · 0 through 0.9.4
Opencats

Description’s affected range: 0.9.4

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Unauthenticated attackers can execute arbitrary commands by uploading malicious PHP files disguised as resume attachments. Vendor/CNA’s CVSS 4.0 assessment (base score 9.3/10) rates confidentiality, integrity and availability impact as high.

Published 2026-10-07 02:35:16.356932+00:00

CWE: CWE-306
CCR priority: 39.4 /100 (P4)
CVSS 3.1: 9.8 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · Vendor/CNA
EPSS: 0.00656 · percentile 0.49675 · 2026-10-05
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-07 02:34:12.333111+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2021-47936.html