CVE-2025-34158

HIGHNVD 8.58.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.5 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 58% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
8.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
8.5
EG Score
8.5(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity85% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
45%
KEV
Not listed

Published

August 21, 2025

Last Modified

April 15, 2026

Advisory Details (8)

Auto-updated Sep 2, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

Plex Media Server (PMS) 1.41.7.x - 1.42.0.x Unspecified Vulnerabiliity | Advisories | VulnCheck

https://www.vulncheck.com/advisories/plex-media-server-unspecified
generic

Plex Media Server 1.41.7.x < 1.42.1 Undisclosed Vulnerability<!-- --> | Tenable®

https://www.tenable.com/plugins/nessus/250294
generic🔴 Active Exploitation

Plex Media Server vulnerability: find impacted assets

https://www.runzero.com/blog/plex/
generic

Media Server Downloads | Plex Media Server for Windows, Mac, Linux, FreeBSD and More

https://www.plex.tv/media-server-downloads/
generic🔴 Active Exploitation

Plex warns users to patch security vulnerability immediately

https://www.bleepingcomputer.com/news/security/plex-warns-users-to-patch-security-vulnerability-immediately/
generic🟡 PoC Available

vulnerability-research/CVE-2025-34158 at main · lufinkey/vulnerability-research · GitHub

https://github.com/lufinkey/vulnerability-research/tree/main/CVE-2025-34158
generic🟡 PoC Available

vulnerability-research/CVE-2025-34158/README.md at main · lufinkey/vulnerability-research · GitHub

https://github.com/lufinkey/vulnerability-research/blob/main/CVE-2025-34158/README.md
generic

Plex Media Server - Security Update - Announcements - Plex Forum

https://forums.plex.tv/t/plex-media-server-security-update/928341

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 25× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 172 total refreshes for this CVE.

  1. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-17 19:29 UTCEPSS rescore
  3. 2026-09-16 14:07 UTCEPSS rescore
  4. 2026-09-16 05:14 UTCEPSS rescore
  5. 2026-09-13 16:46 UTCEPSS rescore
  6. 2026-09-12 15:00 UTCEPSS rescore
  7. 2026-09-11 14:52 UTCEPSS rescore
  8. 2026-09-11 09:35 UTCEPSS rescore
  9. 2026-09-10 09:33 UTCEPSS rescore
  10. 2026-09-08 21:59 UTCEPSS rescore
  11. 2026-09-07 16:00 UTCEPSS rescore
  12. 2026-09-06 13:46 UTCEPSS rescore
  13. 2026-09-04 05:05 UTCEPSS rescore
  14. 2026-09-02 14:11 UTCEPSS rescore
  15. 2026-09-01 13:53 UTCEPSS rescore
  16. 2026-09-01 04:38 UTCEPSS rescore
  17. 2026-08-30 19:16 UTCEPSS rescore
  18. 2026-08-30 01:21 UTCEPSS rescore
  19. 2026-08-28 21:40 UTCEPSS rescore
  20. 2026-08-27 14:24 UTCEPSS rescore
  21. 2026-08-26 14:45 UTCEPSS rescore
  22. 2026-08-25 13:48 UTCEPSS rescore
  23. 2026-08-23 00:18 UTCEPSS rescore
  24. 2026-08-21 23:48 UTCEPSS rescore
  25. 2026-08-20 22:54 UTCEPSS rescore
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  1. 2026-08-19 17:03 UTCEPSS rescore
  2. 2026-08-19 17:03 UTCEPSS rescore
  3. 2026-08-18 13:47 UTCEPSS rescore
  4. 2026-08-17 13:46 UTCEPSS rescore
  5. 2026-08-16 14:55 UTCEPSS rescore
  6. 2026-08-16 02:13 UTCEPSS rescore
  7. 2026-08-15 01:29 UTCEPSS rescore
  8. 2026-08-13 21:59 UTCEPSS rescore
  9. 2026-08-12 13:50 UTCEPSS rescore
  10. 2026-08-09 13:46 UTCEPSS rescore
  11. 2026-08-08 16:36 UTCEPSS rescore
  12. 2026-08-07 16:26 UTCEPSS rescore
  13. 2026-08-06 13:46 UTCEPSS rescore
  14. 2026-08-04 15:09 UTCEPSS rescore
  15. 2026-08-04 10:37 UTCEPSS rescore
  16. 2026-08-03 10:35 UTCEPSS rescore
  17. 2026-08-02 02:26 UTCEPSS rescore
  18. 2026-08-01 04:15 UTCEPSS rescore
  19. 2026-07-30 16:27 UTCEPSS rescore
  20. 2026-07-30 01:29 UTCEPSS rescore
  21. 2026-07-28 15:35 UTCEPSS rescore
  22. 2026-07-26 14:54 UTCEPSS rescore
  23. 2026-07-25 14:17 UTCEPSS rescore
  24. 2026-07-25 14:17 UTCEPSS rescore
  25. 2026-07-24 14:17 UTCEPSS rescore
  26. 2026-07-23 02:54 UTCEG score recompute▲ 1.30
  27. 2026-07-22 14:07 UTCEPSS rescore
  28. 2026-07-22 14:07 UTCEPSS rescore
  29. 2026-07-21 15:24 UTCEPSS rescore
  30. 2026-07-20 17:07 UTCEPSS rescore
  31. 2026-07-19 14:30 UTCEPSS rescore
  32. 2026-07-19 14:30 UTCEPSS rescore
  33. 2026-07-19 02:28 UTCEPSS rescore
  34. 2026-07-19 02:28 UTCEPSS rescore
  35. 2026-07-18 10:04 UTCEPSS rescore
  36. 2026-07-18 10:04 UTCEPSS rescore
  37. 2026-07-16 17:02 UTCEPSS rescore
  38. 2026-07-15 16:57 UTCEPSS rescore
  39. 2026-07-15 16:57 UTCEPSS rescore
  40. 2026-07-15 01:59 UTCEPSS rescore
  41. 2026-07-15 01:59 UTCEPSS rescore
  42. 2026-07-13 22:29 UTCEPSS rescore
  43. 2026-07-13 22:29 UTCEPSS rescore
  44. 2026-07-13 06:12 UTCEPSS rescore
  45. 2026-07-12 05:46 UTCEPSS rescore
  46. 2026-07-11 08:27 UTCEPSS rescore
  47. 2026-07-11 08:27 UTCEPSS rescore
  48. 2026-07-09 19:09 UTCEPSS rescore
  49. 2026-07-09 19:09 UTCEPSS rescore
  50. 2026-07-07 13:45 UTCEPSS rescore
  51. 2026-07-06 16:27 UTCEPSS rescore
  52. 2026-07-06 16:27 UTCEPSS rescore
  53. 2026-07-06 02:23 UTCEPSS rescore
  54. 2026-07-05 02:30 UTCEPSS rescore
  55. 2026-07-04 06:30 UTCEPSS rescore
  56. 2026-07-01 15:06 UTCEPSS rescore
  57. 2026-07-01 15:06 UTCEPSS rescore
  58. 2026-06-30 23:22 UTCEPSS rescore
  59. 2026-06-30 23:22 UTCEPSS rescore
  60. 2026-06-29 14:06 UTCEPSS rescore
  61. 2026-06-29 14:06 UTCEPSS rescore
  62. 2026-06-28 14:07 UTCEPSS rescore
  63. 2026-06-28 14:07 UTCEPSS rescore
  64. 2026-06-28 04:55 UTCEPSS rescore
  65. 2026-06-28 04:55 UTCEPSS rescore
  66. 2026-06-27 03:08 UTCEPSS rescore
  67. 2026-06-27 03:08 UTCEPSS rescore
  68. 2026-06-25 13:49 UTCEPSS rescore
  69. 2026-06-25 13:49 UTCEPSS rescore
  70. 2026-06-24 14:04 UTCEPSS rescore
  71. 2026-06-24 14:04 UTCEPSS rescore
  72. 2026-06-23 21:32 UTCEPSS rescore
  73. 2026-06-23 21:32 UTCEPSS rescore
  74. 2026-06-22 14:25 UTCEPSS rescore
  75. 2026-06-22 14:25 UTCEPSS rescore

Frequently asked(5)

What is CVE-2025-34158?
CVE-2025-34158 is a high vulnerability published on August 21, 2025. 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).
When was CVE-2025-34158 disclosed?
CVE-2025-34158 was first published in the National Vulnerability Database on August 21, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-34158 actively exploited?
CVE-2025-34158 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 54.8% of all scored CVEs.
What is the CVSS score of CVE-2025-34158?
CVE-2025-34158 has a CVSS v3 base score of 8.5 (NVD).
How do I remediate CVE-2025-34158?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-34158, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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