Deserialization Vulnerability in Plex Media Server by Plex
CVE-2020-5741

7.2HIGH

Key Information:

Vendor

Plex

Status
Plex Media Server (windows)
Vendor
CVE Published:
8 May 2020

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 72%🦅 CISA Reported

What is CVE-2020-5741?

A security flaw in Plex Media Server for Windows enables remote, authenticated attackers to exploit deserialization of untrusted data. This vulnerability allows the execution of arbitrary Python code, potentially compromising the system’s security. Users are urged to update their software to mitigate associated risks.

CISA has reported CVE-2020-5741

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2020-5741 as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply updates per vendor instructions.

Affected Version(s)

Plex Media Server (Windows) Versions prior to 1.19.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-34158-CVE-2020-5741
Created by HORKimhab

References

https://www.tenable.com/security/research/tra-2020-32
x_refsource_MISC
http://packetstormsecurity.com/files/158470/Plex-Unpickle...
x_refsource_MISC

EPSS Score

72% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.2
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • 🦅

    CISA Reported

  • Vulnerability published

  • Vulnerability Reserved

.