CVE-2020-5741 on CISA KEV

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

01What CISA says about this vulnerability

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

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

• www.tenable.com — https://www.tenable.com/security/research/tra-2020-32
• packetstormsecurity.com — http://packetstormsecurity.com/files/158470/Plex-Unpickle-Dict-Windows-Remote-Co…

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
n	a / Plex Media Server (Windows)	Versions prior to 1.19.3

06Detection

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection:

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