CVE-2026-6937

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-05-28. NVD baseline CVSS 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.3Exploit: NoneExposed: 0

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

The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 1.6.11.8 due to the plugin not properly verifying that a user is authorized to perform an action via the bulk appointments REST API endpoint. This makes it possible for unauthenticated attackers to modify arbitrary appointment records including customer PII, payment status, and meeting URL fields, and to expose full customer PII from existing appointment records via the bulk endpoint response. The public nonce is a static, user-independent value present in the HTML source of any page hosting the [ssa_booking] shortcode, meaning any visitor who has viewed such a page can obtain it and target any appointment in the system without authentication.

CVSS v3
5.3
EG Score
5.3(medium)
EPSS
42.9%
KEV
Not listed

Published

May 28, 2026

Last Modified

May 28, 2026

References (11)

Vendor Advisories for CVE-2026-6937(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 12× in last 7d / 65× 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 127 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-6937?
CVE-2026-6937 is a medium vulnerability published on May 28, 2026. The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 1.6.11.8 due to the plugin not properly verifying that a user is authorized to perform an action via the bulk appointments…
When was CVE-2026-6937 disclosed?
CVE-2026-6937 was first published in the National Vulnerability Database on May 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6937 actively exploited?
CVE-2026-6937 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 42.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-6937?
CVE-2026-6937 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-6937?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6937, 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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