{"id":"CVE-2026-9721","state":"PUBLISHED","title":"Book a Room Event Calendar <= 1.9 - Cross-Site Request Forgery to Settings Update","description":"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.","publishedAt":"2026-06-24T05:33:22.374Z","updatedAt":"2026-06-24T14:49:33.002Z","severity":{"score":4.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","source":"Wordfence"},"assigner":"Wordfence","products":["chuhpl Book a Room Event Calendar"],"affected":[{"vendor":"chuhpl","product":"Book a Room Event Calendar","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.9","versionType":"semver"}]}],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/18b77c9b-6614-4a3f-a003-54567d9c4408?source=cve","https://plugins.trac.wordpress.org/browser/book-a-room-event-calendar/trunk/bookaroom-events-settings.php#L103","https://plugins.trac.wordpress.org/browser/book-a-room-event-calendar/trunk/bookaroom-events-settings.php#L161","https://plugins.trac.wordpress.org/browser/book-a-room-event-calendar/trunk/bookaroom-events-settings.php#L15"],"weaknesses":["CWE-352"],"ingestedAt":"2026-10-29T20:13:52.441Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/9xxx/CVE-2026-9721.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-9721","state":"PUBLISHED","datePublished":"2026-06-24T05:33:22.374Z","dateUpdated":"2026-06-24T14:49:33.002Z","assignerShortName":"Wordfence","assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateReserved":"2026-05-27T16:08:07.402Z"},"containers":{"cna":{"title":"Book a Room Event Calendar <= 1.9 - Cross-Site Request Forgery to Settings Update","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"chuhpl","product":"Book a Room Event Calendar","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.9","versionType":"semver"}]}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/18b77c9b-6614-4a3f-a003-54567d9c4408?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/book-a-room-event-calendar/trunk/bookaroom-events-settings.php#L103"},{"url":"https://plugins.trac.wordpress.org/browser/book-a-room-event-calendar/trunk/bookaroom-events-settings.php#L161"},{"url":"https://plugins.trac.wordpress.org/browser/book-a-room-event-calendar/trunk/bookaroom-events-settings.php#L15"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","baseScore":4.3,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-352","lang":"en","description":"CWE-352 Cross-Site Request Forgery (CSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"Wordfence","orgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateUpdated":"2026-06-24T05:33:22.374Z"},"credits":[{"lang":"en","type":"finder","value":"swat"}],"timeline":[{"time":"2026-06-23T16:40:58.000Z","lang":"en","value":"Disclosed"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-24T14:49:24.282716Z","id":"CVE-2026-9721","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-24T14:49:33.002Z"}}]}}}