CVE-2026-27377

MEDIUMPre-NVD 6.76.7—
EchelonGraph scoreMEDIUM confidence

Score 6.7 from GitHub Security Advisory published 2026-07-23. a secondary CVSS source baseline 6.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.7Exploit: None knownExposed: 0

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

Booking Agent Broken Access Control in QuickCal - Appointment Booking Calendar for WordPress <= 1.0.16 versions.

CVSS v3
6.7
EG Score
6.7(medium)
EG Risk
30(Track)
EG Risk 30/100SSVC: 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
Severity67% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

July 23, 2026

Last Modified

July 23, 2026

Advisory Details (1)

Auto-updated Jul 23, 2026
Patch available.
generic Patch Available

Broken Access Control in WordPress QuickCal - Appointment Booking Calendar for WordPress Plugin - Patchstack

https://patchstack.com/database/wordpress/plugin/quickcal/vulnerability/wordpress-quickcal-appointment-booking-calendar-for-wordpress-plugin-1-0-16-broken-access-control-vulnerability?_s_id=cve

Vendor Advisories for CVE-2026-27377(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 15× in last 7d / 73× 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 139 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-27377?
CVE-2026-27377 is a medium vulnerability published on July 23, 2026. Booking Agent Broken Access Control in QuickCal - Appointment Booking Calendar for WordPress <= 1.0.16 versions.
When was CVE-2026-27377 disclosed?
CVE-2026-27377 was first published in the National Vulnerability Database on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-27377 actively exploited?
CVE-2026-27377 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 68.2% of all scored CVEs.
What is the CVSS score of CVE-2026-27377?
CVE-2026-27377 has a CVSS v3 base score of 6.7 (NVD).
How do I remediate CVE-2026-27377?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-27377, 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-2026-27377

Explore →

Is Your Infrastructure Affected by CVE-2026-27377?

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

Start Free Scan →Browse All CVEs