CVE-2026-18366

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-12. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
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: Elevated riskExposed: 0

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

The Events Manager WordPress plugin before 7.4.1 does not properly scope its capability mapping, discarding the access control decisions WordPress already made for unrelated privileged actions, which allows unauthenticated users to change the password of, escalate to Administrator, or delete any account whose user ID happens to match the ID of one of the Events Manager WordPress plugin before 7.4.1's own posts.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

August 12, 2026

Last Modified

August 12, 2026

Advisory Details (1)

Auto-updated Aug 19, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Events Manager < 7.4.1 – Unauthenticated Privilege Escalation to Administrator | CVE 2026-18366 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/82767ce2-01e4-46ad-a52b-72d3ab2049bd/

Vendor Advisories for CVE-2026-18366(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 57× in last 7d / 79× 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.

  1. 2026-08-21 05:23 UTCGHSA enrichment
  2. 2026-08-21 01:33 UTCEG score recompute
  3. 2026-08-21 01:33 UTCGHSA enrichment
  4. 2026-08-20 22:55 UTCEPSS rescore
  5. 2026-08-20 21:44 UTCGHSA enrichment
  6. 2026-08-20 17:55 UTCGHSA enrichment
  7. 2026-08-20 14:06 UTCGHSA enrichment
  8. 2026-08-20 09:53 UTCGHSA enrichment
  9. 2026-08-20 06:04 UTCGHSA enrichment
  10. 2026-08-20 02:15 UTCGHSA enrichment
  11. 2026-08-19 22:26 UTCGHSA enrichment
  12. 2026-08-19 18:37 UTCEG score recompute
  13. 2026-08-19 18:37 UTCGHSA enrichment
  14. 2026-08-19 17:03 UTCEPSS rescore
  15. 2026-08-19 14:36 UTCGHSA enrichment
  16. 2026-08-19 10:41 UTCGHSA enrichment
  17. 2026-08-19 06:46 UTCGHSA enrichment
  18. 2026-08-19 02:56 UTCGHSA enrichment
  19. 2026-08-18 22:51 UTCGHSA enrichment
  20. 2026-08-18 19:03 UTCGHSA enrichment
  21. 2026-08-18 15:13 UTCEG score recompute
  22. 2026-08-18 15:13 UTCGHSA enrichment
  23. 2026-08-18 13:48 UTCEPSS rescore
  24. 2026-08-18 10:38 UTCGHSA enrichment
  25. 2026-08-18 06:48 UTCGHSA enrichment
Show 54 more
  1. 2026-08-18 02:56 UTCGHSA enrichment
  2. 2026-08-17 23:07 UTCGHSA enrichment
  3. 2026-08-17 19:15 UTCGHSA enrichment
  4. 2026-08-17 14:55 UTCEG score recompute
  5. 2026-08-17 14:55 UTCGHSA enrichment
  6. 2026-08-17 13:47 UTCEPSS rescore
  7. 2026-08-17 11:06 UTCGHSA enrichment
  8. 2026-08-17 07:17 UTCGHSA enrichment
  9. 2026-08-17 03:29 UTCGHSA enrichment
  10. 2026-08-16 23:40 UTCGHSA enrichment
  11. 2026-08-16 19:51 UTCGHSA enrichment
  12. 2026-08-16 16:02 UTCEG score recompute
  13. 2026-08-16 16:02 UTCGHSA enrichment
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 12:13 UTCGHSA enrichment
  16. 2026-08-16 08:25 UTCGHSA enrichment
  17. 2026-08-16 04:36 UTCEG score recompute
  18. 2026-08-16 04:36 UTCGHSA enrichment
  19. 2026-08-16 02:14 UTCEPSS rescore
  20. 2026-08-16 00:47 UTCGHSA enrichment
  21. 2026-08-15 20:58 UTCGHSA enrichment
  22. 2026-08-15 17:09 UTCGHSA enrichment
  23. 2026-08-15 13:20 UTCGHSA enrichment
  24. 2026-08-15 09:31 UTCGHSA enrichment
  25. 2026-08-15 05:42 UTCGHSA enrichment
  26. 2026-08-15 01:53 UTCEG score recompute
  27. 2026-08-15 01:53 UTCGHSA enrichment
  28. 2026-08-15 01:30 UTCEPSS rescore
  29. 2026-08-14 22:04 UTCGHSA enrichment
  30. 2026-08-14 18:12 UTCGHSA enrichment
  31. 2026-08-14 14:23 UTCGHSA enrichment
  32. 2026-08-14 10:34 UTCGHSA enrichment
  33. 2026-08-14 06:45 UTCGHSA enrichment
  34. 2026-08-14 02:56 UTCGHSA enrichment
  35. 2026-08-13 23:07 UTCEG score recompute
  36. 2026-08-13 23:07 UTCGHSA enrichment
  37. 2026-08-13 22:00 UTCEPSS rescore
  38. 2026-08-13 19:18 UTCGHSA enrichment
  39. 2026-08-13 15:29 UTCGHSA enrichment
  40. 2026-08-13 11:36 UTCGHSA enrichment
  41. 2026-08-13 07:47 UTCGHSA enrichment
  42. 2026-08-13 03:58 UTCGHSA enrichment
  43. 2026-08-13 00:09 UTCEG score recompute
  44. 2026-08-13 00:09 UTCGHSA enrichment
  45. 2026-08-12 20:21 UTCEG score recompute
  46. 2026-08-12 20:21 UTCGHSA enrichment
  47. 2026-08-12 19:46 UTCEG score recompute▲ 9.80
  48. 2026-08-12 19:46 UTCGHSA enrichment
  49. 2026-08-12 19:45 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  50. 2026-08-12 13:50 UTCEPSS rescore
  51. 2026-08-12 06:31 UTCGHSA enrichment
  52. 2026-08-12 06:30 UTCNVD update
  53. 2026-08-12 06:06 UTCEG score recompute
  54. 2026-08-12 06:03 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-18366?
CVE-2026-18366 is a critical vulnerability published on August 12, 2026. The Events Manager WordPress plugin before 7.4.1 does not properly scope its capability mapping, discarding the access control decisions WordPress already made for unrelated privileged actions, which allows unauthenticated users to change the password of, escalate to Administrator, or delete any…
When was CVE-2026-18366 disclosed?
CVE-2026-18366 was first published in the National Vulnerability Database on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18366 actively exploited?
CVE-2026-18366 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 77.0% of all scored CVEs.
What is the CVSS score of CVE-2026-18366?
CVE-2026-18366 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-18366?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18366, 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-2026-18366

Explore →

Is Your Infrastructure Affected by CVE-2026-18366?

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

Start Free Scan →Browse All CVEs