CVE-2021-33959

HIGH

Plex Media Server < 1.21 - Origin Validation Error

Title source: rule

Description

Plex media server 1.21 and before is vulnerable to ddos reflection attack via plex service.

Exploits (1)

nomisec WORKING POC 1 stars
by lixiang957 · poc
https://github.com/lixiang957/CVE-2021-33959

References (2)

Scores

CVSS v3 7.5
EPSS 0.0886
EPSS Percentile 92.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Classification

CWE
CWE-346
Status published

Affected Products (1)

plex/media_server < 1.21

Timeline

Published Jan 18, 2023
Tracked Since Feb 18, 2026