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).
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
8.5 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
mitreCNA
8.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
CISA-ADPADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 19%
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://forums.plex.tv/t/plex-media-server-security-update/928341
https://github.com/lufinkey/vulnerability-research/blob/main/CVE-2025-34158/README.md
https://github.com/lufinkey/vulnerability-research/tree/main/CVE-2025-34158
https://www.bleepingcomputer.com/news/security/plex-warns-users-to-patch-security-vulnerability-immediately/
https://www.plex.tv/media-server-downloads/
https://www.runzero.com/blog/plex/
https://www.tenable.com/plugins/nessus/250294
https://www.vulncheck.com/advisories/plex-media-server-unspecified