CVE-2025-54001

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-03-05. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

Deserialization of Untrusted Data vulnerability in ThemeREX Classter classter allows Object Injection.This issue affects Classter: from n/a through <= 2.5.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

March 5, 2026

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Sep 14, 2026
Patch available.
generic Patch Available

PHP Object Injection in WordPress Classter Theme - Patchstack

https://patchstack.com/database/Wordpress/Theme/classter/vulnerability/wordpress-classter-theme-2-5-php-object-injection-vulnerability?_s_id=cve

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 29× 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 232 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-54001?
CVE-2025-54001 is a critical vulnerability published on March 5, 2026. Deserialization of Untrusted Data vulnerability in ThemeREX Classter classter allows Object Injection.This issue affects Classter: from n/a through <= 2.5.
When was CVE-2025-54001 disclosed?
CVE-2025-54001 was first published in the National Vulnerability Database on March 5, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-54001 actively exploited?
CVE-2025-54001 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 57.5% of all scored CVEs.
What is the CVSS score of CVE-2025-54001?
CVE-2025-54001 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2025-54001?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-54001, 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2025-54001

Explore →

Is Your Infrastructure Affected by CVE-2025-54001?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs