CVE-2026-66599

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-24. a secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

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

Unauthenticated Cross Site Scripting (XSS) in WPComplete <= 2.9.5.6 versions.

CVSS v3
7.1
EG Score
7.1(high)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

August 24, 2026

Last Modified

August 24, 2026

Advisory Details (1)

Auto-updated Aug 24, 2026
No patch confirmed yet.
generic

Cross Site Scripting (XSS) in WordPress WPComplete Plugin - Patchstack

https://patchstack.com/database/wordpress/plugin/wpcomplete/vulnerability/wordpress-wpcomplete-plugin-2-9-5-6-cross-site-scripting-xss-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-66599(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 27× in last 7d / 27× 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. 2026-08-30 01:56 UTCEG score recompute
  2. 2026-08-30 01:56 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-29 13:12 UTCGHSA enrichment
  5. 2026-08-29 00:28 UTCEG score recompute
  6. 2026-08-29 00:27 UTCGHSA enrichment
  7. 2026-08-28 21:42 UTCEPSS rescore
  8. 2026-08-28 09:53 UTCGHSA enrichment
  9. 2026-08-27 21:08 UTCEG score recompute
  10. 2026-08-27 21:08 UTCGHSA enrichment
  11. 2026-08-27 08:25 UTCGHSA enrichment
  12. 2026-08-26 19:39 UTCEG score recompute
  13. 2026-08-26 19:39 UTCGHSA enrichment
  14. 2026-08-26 14:47 UTCEPSS rescore
  15. 2026-08-26 06:56 UTCGHSA enrichment
  16. 2026-08-25 18:13 UTCEG score recompute
  17. 2026-08-25 18:13 UTCGHSA enrichment
  18. 2026-08-25 13:49 UTCEPSS rescore
  19. 2026-08-25 05:28 UTCGHSA enrichment
  20. 2026-08-24 16:45 UTCGHSA enrichment
  21. 2026-08-24 14:24 UTCEG score recompute
  22. 2026-08-24 14:24 UTCGHSA enrichment
  23. 2026-08-24 13:23 UTCEG score recompute
  24. 2026-08-24 13:22 UTCGHSA enrichment
  25. 2026-08-24 12:21 UTCEG score recompute
Show 2 more
  1. 2026-08-24 11:49 UTCEG score recompute
  2. 2026-08-24 11:45 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-66599?
CVE-2026-66599 is a high vulnerability published on August 24, 2026. Unauthenticated Cross Site Scripting (XSS) in WPComplete <= 2.9.5.6 versions.
When was CVE-2026-66599 disclosed?
CVE-2026-66599 was first published in the National Vulnerability Database on August 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66599 actively exploited?
CVE-2026-66599 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 95.8% of all scored CVEs.
What is the CVSS score of CVE-2026-66599?
CVE-2026-66599 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-66599?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66599, 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-2026-66599

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