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Exploited vulnerability · CISA KEV

Is CVE-2020-5741 exploited? Yes: in CISA KEV since 10 Mar 2023

Gociux · Plex Media Server · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2020-5741, Plex Media Server Remote Code Execution Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 10 Mar 2023, 1036 days after it was published. It affects Plex Media Server. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 10 Mar 2023
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity7.2CVSS 3.1 · high
US federal due31 Mar 2023BOD 22-01 deadline

What it is

Plex Media Server contains a remote code execution vulnerability that allows an attacker with access to the server administrator's Plex account to upload a malicious file via the Camera Upload feature and have the media server execute it.

VendorPlex (5 exploited CVEs in KEV)
ProductMedia Server
VulnerabilityPlex Media Server Remote Code Execution Vulnerability
WeaknessCWE-502
Published8 May 2020
Added to KEV10 Mar 2023
Reported by (CNA)tenable

What to do

  1. Check whether you run it. Look for Media Server in your asset inventory, including appliances and cloud images. Stack check lists every exploited Plex CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 8 May 2020.
  4. Get told next time. Email alerts when CISA adds a CVE for Plex.

Other exploited CVEs in Media Server

References

Questions

Is CVE-2020-5741 being exploited?

Yes. CISA added CVE-2020-5741 to the Known Exploited Vulnerabilities catalog on 10 Mar 2023, which means there is reliable evidence of exploitation in the wild.

Is CVE-2020-5741 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2020-5741?

Apply updates per vendor instructions. Check Plex's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Media Server and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in March 2023 · Plex scorecard · act-now radar.

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