CVE-2026-9721

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-06-24. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

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

The Book a Room Event Calendar plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.9. This is due to missing or incorrect nonce validation on the settings_form()/update_settings() functionality. The plugin's options page handler dispatches on the 'action' POST parameter and calls update_settings(), which persists plugin configuration (including the external database host, username, password, prefix, database name, encryption key, and registration page URL) via update_option(), without ever generating a nonce field in the settings form or verifying one (no wp_nonce_field(), check_admin_referer(), or wp_verify_nonce() exists anywhere in the plugin). This makes it possible for unauthenticated attackers to modify the plugin's database connection settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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
Severity43% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

June 24, 2026

Last Modified

June 25, 2026

References (4)

Vendor Advisories for CVE-2026-9721(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 6× in last 7d / 51× 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 154 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-9721?
CVE-2026-9721 is a medium vulnerability published on June 24, 2026. The Book a Room Event Calendar plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.9. This is due to missing or incorrect nonce validation on the settingsform()/updatesettings() functionality. The plugin's options page handler dispatches on the…
When was CVE-2026-9721 disclosed?
CVE-2026-9721 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on June 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9721 actively exploited?
CVE-2026-9721 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 97.1% of all scored CVEs.
What is the CVSS score of CVE-2026-9721?
CVE-2026-9721 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-9721?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9721, 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.

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