Vulnerability · Published Aug 21, 2025 · Assigned by mitre
CVE-2025-34158
High 8.5
In plain English
A high-severity security flaw in Media Server from Plex. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS 3.1)8.5High
Exploit odds (30 days)0.6%top 51.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official description
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).
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Plex | Media Server | 1.41.7.x – before 1.42.1 |
Weakness: CWE-669 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
References
- https://www.plex.tv/media-server-downloads/
- https://forums.plex.tv/t/plex-media-server-security-update/928341
- https://www.bleepingcomputer.com/news/security/plex-warns-users-to-patch-security-vulnerability-immediately/
- https://www.runzero.com/blog/plex/
- https://www.tenable.com/plugins/nessus/250294
- https://www.vulncheck.com/advisories/plex-media-server-unspecified
- https://github.com/lufinkey/vulnerability-research/tree/main/CVE-2025-34158
- https://github.com/lufinkey/vulnerability-research/blob/main/CVE-2025-34158/README.md