CVE-2026-66600

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-20. a secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

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

Author Arbitrary File Upload in Media LIbrary Assistant <= 3.39 versions.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

August 20, 2026

Last Modified

August 20, 2026

Advisory Details (1)

Auto-updated Sep 15, 2026
No patch confirmed yet.
generic

Arbitrary File Upload in WordPress Media LIbrary Assistant Plugin - Patchstack

https://patchstack.com/database/wordpress/plugin/media-library-assistant/vulnerability/wordpress-media-library-assistant-plugin-3-39-arbitrary-file-upload-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-66600(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 54× in last 7d / 232× 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 255 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-66600?
CVE-2026-66600 is a critical vulnerability published on August 20, 2026. Author Arbitrary File Upload in Media LIbrary Assistant <= 3.39 versions.
When was CVE-2026-66600 disclosed?
CVE-2026-66600 was first published in the National Vulnerability Database on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66600 actively exploited?
CVE-2026-66600 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 72.2% of all scored CVEs.
What is the CVSS score of CVE-2026-66600?
CVE-2026-66600 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-66600?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66600, 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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