How severe is CVE-2025-34158?

CVE-2025-34158 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2025-34158 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-34158?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-34158 have an EU (EUVD) identifier?

Yes. CVE-2025-34158 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25425.

When was CVE-2025-34158 published?

CVE-2025-34158 was published on 2025-08-21 and last updated on 2026-06-17.

CVE-2025-34158

CVE-2025-34158 is a high-severity vulnerability with a CVSS 3.x base score of 8.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-669.

Key facts

Severity: High (CVSS 3.x base score 8.5)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-25425
Weakness: CWE-669
Published: 2025-08-21
Last modified: 2026-06-17

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).

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).
How severe is CVE-2025-34158?: CVE-2025-34158 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2025-34158 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-34158?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-34158 have an EU (EUVD) identifier?: Yes. CVE-2025-34158 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25425.
When was CVE-2025-34158 published?: CVE-2025-34158 was published on 2025-08-21 and last updated on 2026-06-17.

References

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