Denial of Service Vulnerability in Plex Media Server by Plex
CVE-2021-33959

7.5HIGH

Key Information:

Vendor

Plex

Status
Media Server
Vendor
CVE Published:
18 January 2023

Badges

👾 Exploit Exists🟣 EPSS 15%

What is CVE-2021-33959?

The Plex Media Server versions up to 1.21 are susceptible to a Denial of Service (DoS) vulnerability that allows attackers to execute reflection attacks through the Plex service. This exploitation can severely impact network performance and availability, rendering the media server inoperable for legitimate users. It is critical for users of affected versions to apply the necessary updates to mitigate potential threats.

References

https://www.freebuf.com/articles/web/260338.html
https://github.com/lixiang957/CVE-2021-33959

EPSS Score

15% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability Reserved

.