CVE-2025-53209

CRITICALPre-NVD 9.89.8
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-02. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

Incorrect Privilege Assignment vulnerability in Themeisle Masteriyo LMS PRO allows Privilege Escalation.

This issue affects Masteriyo LMS PRO: from n/a through 2.20.0.

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%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

June 2, 2026

Last Modified

July 22, 2026

Advisory Details (1)

Auto-updated Sep 12, 2026
No patch confirmed yet.

Vendor Advisories for CVE-2025-53209(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 48× 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 421 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2025-53209?
CVE-2025-53209 is a critical vulnerability published on June 2, 2026. Incorrect Privilege Assignment vulnerability in Themeisle Masteriyo LMS PRO allows Privilege Escalation. This issue affects Masteriyo LMS PRO: from n/a through 2.20.0.
When was CVE-2025-53209 disclosed?
CVE-2025-53209 was first published in the National Vulnerability Database on June 2, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-53209 actively exploited?
CVE-2025-53209 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 80.1% of all scored CVEs.
What is the CVSS score of CVE-2025-53209?
CVE-2025-53209 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2025-53209?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-53209, 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-2025-53209

Explore →

Is Your Infrastructure Affected by CVE-2025-53209?

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