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
Trending — 3 sources updated this week
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
1%
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 17× in last 7d / 54× 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. 2026-08-02 05:26 UTCGHSA enrichment
  2. 2026-08-01 07:43 UTCEG score recompute
  3. 2026-08-01 07:43 UTCGHSA enrichment
  4. 2026-08-01 04:16 UTCEPSS rescore
  5. 2026-07-31 09:10 UTCEG score recompute
  6. 2026-07-31 09:10 UTCGHSA enrichment
  7. 2026-07-30 16:28 UTCEPSS rescore
  8. 2026-07-30 11:12 UTCEG score recompute
  9. 2026-07-30 11:12 UTCGHSA enrichment
  10. 2026-07-30 01:30 UTCEPSS rescore
  11. 2026-07-29 13:09 UTCEG score recompute
  12. 2026-07-29 13:09 UTCGHSA enrichment
  13. 2026-07-28 15:37 UTCEPSS rescore
  14. 2026-07-28 15:26 UTCGHSA enrichment
  15. 2026-07-27 17:44 UTCGHSA enrichment
  16. 2026-07-26 15:46 UTCEG score recompute
  17. 2026-07-26 15:46 UTCGHSA enrichment
  18. 2026-07-25 14:18 UTCEPSS rescore
  19. 2026-07-24 14:18 UTCEPSS rescore
  20. 2026-07-23 03:23 UTCEG score recompute
  21. 2026-07-22 14:08 UTCEPSS rescore
  22. 2026-07-21 15:25 UTCEPSS rescore
  23. 2026-07-20 17:08 UTCEPSS rescore
  24. 2026-07-19 14:31 UTCEPSS rescore
  25. 2026-07-18 10:04 UTCEPSS rescore
Show 47 more
  1. 2026-07-16 22:49 UTCGHSA enrichment
  2. 2026-07-16 17:03 UTCEPSS rescore
  3. 2026-07-16 01:07 UTCGHSA enrichment
  4. 2026-07-15 16:57 UTCEPSS rescore
  5. 2026-07-15 03:23 UTCGHSA enrichment
  6. 2026-07-15 02:00 UTCEPSS rescore
  7. 2026-07-14 05:38 UTCGHSA enrichment
  8. 2026-07-13 22:31 UTCEPSS rescore
  9. 2026-07-13 07:56 UTCGHSA enrichment
  10. 2026-07-13 06:13 UTCEPSS rescore
  11. 2026-07-12 10:12 UTCGHSA enrichment
  12. 2026-07-12 05:46 UTCEPSS rescore
  13. 2026-07-11 12:29 UTCGHSA enrichment
  14. 2026-07-11 08:27 UTCEPSS rescore
  15. 2026-07-10 14:46 UTCGHSA enrichment
  16. 2026-07-09 19:10 UTCEPSS rescore
  17. 2026-07-09 17:03 UTCGHSA enrichment
  18. 2026-07-08 19:21 UTCGHSA enrichment
  19. 2026-07-08 15:16 UTCEPSS rescore
  20. 2026-07-07 21:39 UTCGHSA enrichment
  21. 2026-07-07 13:46 UTCEPSS rescore
  22. 2026-07-06 23:54 UTCGHSA enrichment
  23. 2026-07-06 16:27 UTCEPSS rescore
  24. 2026-07-06 02:01 UTCGHSA enrichment
  25. 2026-07-05 04:18 UTCGHSA enrichment
  26. 2026-07-05 02:31 UTCEPSS rescore
  27. 2026-07-04 06:34 UTCGHSA enrichment
  28. 2026-07-04 06:31 UTCEPSS rescore
  29. 2026-07-03 08:44 UTCGHSA enrichment
  30. 2026-07-02 11:01 UTCGHSA enrichment
  31. 2026-07-01 15:07 UTCEPSS rescore
  32. 2026-07-01 13:18 UTCGHSA enrichment
  33. 2026-06-30 23:22 UTCEPSS rescore
  34. 2026-06-30 15:33 UTCGHSA enrichment
  35. 2026-06-29 17:50 UTCGHSA enrichment
  36. 2026-06-28 20:07 UTCGHSA enrichment
  37. 2026-06-28 14:07 UTCEPSS rescore
  38. 2026-06-28 04:56 UTCEPSS rescore
  39. 2026-06-27 22:24 UTCGHSA enrichment
  40. 2026-06-27 03:08 UTCEPSS rescore
  41. 2026-06-27 00:41 UTCGHSA enrichment
  42. 2026-06-26 02:59 UTCGHSA enrichment
  43. 2026-06-25 13:50 UTCEPSS rescore
  44. 2026-06-25 05:16 UTCGHSA enrichment
  45. 2026-06-24 14:05 UTCEPSS rescore
  46. 2026-06-24 07:31 UTCEG score recompute
  47. 2026-06-24 07:29 UTCNVD updatefirst tracked

Related CVEs(same CWE)

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 98.9% 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.

Dependency Blast Radius

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