CVE-2025-34158

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).

CVSS v3.1 Score

8.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Weakness Type (CWE)

CWE-669 CWE-669

References

Other 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

Frequently Asked Questions

What is 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). It has a CVSS v3.1 base score of 8.5 (HIGH).

How severe is CVE-2025-34158? +

CVE-2025-34158 has a CVSS v3.1 score of 8.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2025-34158? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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