Vulnerability in Plex Media Server
CVE-2025-34158
Plex Media Server (PMS) 1.41.7.x through 1.42.0.x before 1.42.1 is affected by incorrect resource transfer between spheres because /myplex/account provides the credentials of the server owner (and a /api/resources call reveals other servers accessible by that server owner).
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.006 (45.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.000
Affected products
- Plex Media Server — versions 1.41.7.x
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.plex.tv/media-server-downloads/
- forums.plex.tv/t/plex-media-server-security-update/928341
- www.bleepingcomputer.com/news/security/plex-warns-users-to-patch-security-vulne…
- www.runzero.com/blog/plex/
- www.tenable.com/plugins/nessus/250294
- www.vulncheck.com/advisories/plex-media-server-unspecified
- github.com/lufinkey/vulnerability-research/tree/main/CVE-2025-34158
- github.com/lufinkey/vulnerability-research/blob/main/CVE-2025-34158/README.md
Frequently asked questions
- What is CVE-2025-34158?
- CVE-2025-34158 is a high-severity vulnerability in Plex Media Server, classified under Incorrect Resource Transfer Between Spheres. CVSS score: 8.5/10. Published 2025-08-21.
- How severe is CVE-2025-34158?
- High severity. CVSS v3 base score is 8.5 out of 10.
- Is CVE-2025-34158 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.