CVE-2021-33959: Plex Media Server

High severity, CVSS 7.5. EPSS: 15% chance of exploitation in the next 30 days.

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

Affected products

• Plex Media Server: up to and including 1.21

Published 2023-01-18. Last modified 2026-06-17.