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.
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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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS