CVE-2026-9721

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH 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
4.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.3Exploit: NoneExposed: 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(high)
EPSS
1.2%
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 21× in last 7d / 40× 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. 2026-07-06 23:54 UTCEG score recompute
  2. 2026-07-06 23:54 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 02:02 UTCEG score recompute
  5. 2026-07-06 02:01 UTCGHSA enrichment
  6. 2026-07-05 04:18 UTCEG score recompute
  7. 2026-07-05 04:18 UTCGHSA enrichment
  8. 2026-07-05 02:31 UTCEPSS rescore
  9. 2026-07-04 06:34 UTCEG score recompute
  10. 2026-07-04 06:34 UTCGHSA enrichment
  11. 2026-07-04 06:31 UTCEPSS rescore
  12. 2026-07-03 08:44 UTCEG score recompute
  13. 2026-07-03 08:44 UTCGHSA enrichment
  14. 2026-07-02 11:01 UTCEG score recompute
  15. 2026-07-02 11:01 UTCGHSA enrichment
  16. 2026-07-01 15:07 UTCEPSS rescore
  17. 2026-07-01 13:18 UTCEG score recompute
  18. 2026-07-01 13:18 UTCGHSA enrichment
  19. 2026-06-30 23:22 UTCEPSS rescore
  20. 2026-06-30 15:34 UTCEG score recompute
  21. 2026-06-30 15:33 UTCGHSA enrichment
  22. 2026-06-29 17:50 UTCEG score recompute
  23. 2026-06-29 17:50 UTCGHSA enrichment
  24. 2026-06-28 20:07 UTCEG score recompute
  25. 2026-06-28 20:07 UTCGHSA enrichment
Show 15 more
  1. 2026-06-28 14:07 UTCEPSS rescore
  2. 2026-06-28 04:56 UTCEPSS rescore
  3. 2026-06-27 22:24 UTCEG score recompute
  4. 2026-06-27 22:24 UTCGHSA enrichment
  5. 2026-06-27 03:08 UTCEPSS rescore
  6. 2026-06-27 00:41 UTCEG score recompute
  7. 2026-06-27 00:41 UTCGHSA enrichment
  8. 2026-06-26 02:59 UTCEG score recompute
  9. 2026-06-26 02:59 UTCGHSA enrichment
  10. 2026-06-25 13:50 UTCEPSS rescore
  11. 2026-06-25 05:16 UTCEG score recompute
  12. 2026-06-25 05:16 UTCGHSA enrichment
  13. 2026-06-24 14:05 UTCEPSS rescore
  14. 2026-06-24 07:31 UTCEG score recompute
  15. 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 1.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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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