CVE-2026-9721
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk1th percentile — higher than 1% of all known CVEs
Summary
The Book a Room Event Calendar plugin for WordPress is vulnerable to Cross-Site Request Forgery (CSRF) in all versions up to and including 1.9. This is due to missing or incorrect nonce validation in the settings_form()/update_settings() functionality.
Risk Assessment
Unauthenticated attackers can modify the plugin's database connection settings, potentially leading to serious security breaches if they trick a site administrator into performing a specific action.
Recommendation
It is recommended to update the plugin to the latest version that includes security fixes and to implement additional nonce verification mechanisms in the settings forms.
Original NVD description (English source)
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.