Read the docs
TI-2020-04669 Aliases CVE-2020-5741GHSA-53fh-qcq6-xwhv

Deserialization of untrusted data in Plex Media Server

Priority CRITICAL 91Exploited in the wildCWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-502.

Summary

Deserialization of Untrusted Data in Plex Media Server on Windows allows a remote, authenticated attacker to execute arbitrary Python code.

Why it matters now

Exploitation Active In CISA KEV since 2023-03-10CISA due date 2023-03-31
EPSS 0.72936 99th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Fixed Plex Media Server (Windows): 1.19.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Plex Media Server (Windows)before 1.19.31.19.3Patch availableCNA
  • Plex Media Server (Windows) Vendor— Affected before 1.19.3 Fixed in 1.19.3 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:plex:media_server:*:*:*:*:*:*:*:*before 1.19.3VulnerablePlex
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:plex:media_server:*:*:*:*:*:*:*:* Versions before 1.19.3 Vulnerable ·Plex
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

  • Fix · CNA Plex Media Server (Windows) Fixed in 1.19.3

Timeline

  1. 2023-03-10 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2020-5741
  3. 2026-10-03 Alias added: GHSA-53fh-qcq6-xwhv

References

Exploit 2

  • TI-2026-63829 Arbitrary file write in Plex Media Server enables code execution KEVCVSS 4.0HIGH 8.6
  • TI-2026-63827 Plex Media Server URL injection lets attackers call other plugins KEVCVSS 4.0MEDIUM 6.9
  • TI-2026-63828 Server-side request forgery in Plex Media Server KEVCVSS 4.0MEDIUM 5.3
  • TI-2026-63826 Server-side request forgery in Plex Media Server KEVCVSS 4.0MEDIUM 5.3
  • TI-2025-42857 Incorrect authorization in Plex Media Server CVSS 3.1HIGH 8.5
  • TI-2021-13235 Plex media server 1.21 and before is vulnerable to ddos reflection attack via plex service. CVSS 3.1HIGH 7.5
See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences