CVE-2026-66453

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-13. 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.

Unauthenticated Broken Authentication in Salon booking system <= 10.30.26 versions.

CVSS v3
9.8
EG Score
9.8(high)
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
34%
KEV
Not listed

Published

August 13, 2026

Last Modified

August 14, 2026

Advisory Details (1)

Auto-updated Aug 14, 2026
No patch confirmed yet.
generic

Broken Authentication in WordPress Salon booking system Plugin - Patchstack

https://patchstack.com/database/wordpress/plugin/salon-booking-system/vulnerability/wordpress-salon-booking-system-plugin-10-30-26-broken-authentication-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-66453(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 / 64× 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 07:10 UTCGHSA enrichment
  2. 2026-08-21 03:06 UTCGHSA enrichment
  3. 2026-08-20 23:02 UTCEG score recompute
  4. 2026-08-20 23:02 UTCGHSA enrichment
  5. 2026-08-20 22:56 UTCEPSS rescore
  6. 2026-08-20 18:59 UTCGHSA enrichment
  7. 2026-08-20 14:55 UTCGHSA enrichment
  8. 2026-08-20 10:49 UTCGHSA enrichment
  9. 2026-08-20 06:46 UTCGHSA enrichment
  10. 2026-08-20 02:42 UTCGHSA enrichment
  11. 2026-08-19 22:32 UTCGHSA enrichment
  12. 2026-08-19 18:28 UTCEG score recompute
  13. 2026-08-19 18:28 UTCGHSA enrichment
  14. 2026-08-19 17:04 UTCEPSS rescore
  15. 2026-08-19 13:54 UTCGHSA enrichment
  16. 2026-08-19 09:48 UTCGHSA enrichment
  17. 2026-08-19 05:45 UTCGHSA enrichment
  18. 2026-08-19 01:41 UTCGHSA enrichment
  19. 2026-08-18 21:38 UTCGHSA enrichment
  20. 2026-08-18 17:12 UTCEG score recompute
  21. 2026-08-18 17:12 UTCGHSA enrichment
  22. 2026-08-18 13:48 UTCEPSS rescore
  23. 2026-08-18 12:48 UTCGHSA enrichment
  24. 2026-08-18 08:44 UTCGHSA enrichment
  25. 2026-08-18 04:41 UTCGHSA enrichment
Show 39 more
  1. 2026-08-18 00:38 UTCGHSA enrichment
  2. 2026-08-17 20:32 UTCGHSA enrichment
  3. 2026-08-17 16:29 UTCEG score recompute
  4. 2026-08-17 16:29 UTCGHSA enrichment
  5. 2026-08-17 13:47 UTCEPSS rescore
  6. 2026-08-17 12:07 UTCGHSA enrichment
  7. 2026-08-17 08:03 UTCGHSA enrichment
  8. 2026-08-17 04:00 UTCGHSA enrichment
  9. 2026-08-16 23:57 UTCGHSA enrichment
  10. 2026-08-16 19:54 UTCGHSA enrichment
  11. 2026-08-16 15:50 UTCEG score recompute
  12. 2026-08-16 15:50 UTCGHSA enrichment
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 11:46 UTCGHSA enrichment
  15. 2026-08-16 07:43 UTCGHSA enrichment
  16. 2026-08-16 03:40 UTCEG score recompute
  17. 2026-08-16 03:40 UTCGHSA enrichment
  18. 2026-08-15 23:37 UTCGHSA enrichment
  19. 2026-08-15 19:34 UTCGHSA enrichment
  20. 2026-08-15 15:31 UTCGHSA enrichment
  21. 2026-08-15 11:28 UTCGHSA enrichment
  22. 2026-08-15 07:25 UTCGHSA enrichment
  23. 2026-08-15 03:22 UTCEG score recompute
  24. 2026-08-15 03:22 UTCGHSA enrichment
  25. 2026-08-15 01:30 UTCEPSS rescore
  26. 2026-08-14 23:18 UTCGHSA enrichment
  27. 2026-08-14 19:15 UTCGHSA enrichment
  28. 2026-08-14 16:52 UTCGHSA enrichment
  29. 2026-08-14 12:43 UTCGHSA enrichment
  30. 2026-08-14 08:40 UTCGHSA enrichment
  31. 2026-08-14 04:37 UTCGHSA enrichment
  32. 2026-08-14 00:34 UTCGHSA enrichment
  33. 2026-08-13 20:30 UTCGHSA enrichment
  34. 2026-08-13 16:27 UTCEG score recompute
  35. 2026-08-13 16:27 UTCGHSA enrichment
  36. 2026-08-13 15:32 UTCEG score recompute
  37. 2026-08-13 14:21 UTCEG score recompute
  38. 2026-08-13 13:53 UTCEG score recompute
  39. 2026-08-13 13:51 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-66453?
CVE-2026-66453 is a critical vulnerability published on August 13, 2026. Unauthenticated Broken Authentication in Salon booking system <= 10.30.26 versions.
When was CVE-2026-66453 disclosed?
CVE-2026-66453 was first published in the National Vulnerability Database on August 13, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66453 actively exploited?
CVE-2026-66453 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 66.1% of all scored CVEs.
What is the CVSS score of CVE-2026-66453?
CVE-2026-66453 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-66453?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66453, 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

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