CVE-2026-9721
Received Received - Intake
Cross-Site Request Forgery in Book a Room Event Calendar WordPress Plugin

Publication date: 2026-06-24

Last updated on: 2026-06-24

Assigner: Wordfence

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.
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Meta Information
Published
2026-06-24
Last Modified
2026-06-24
Generated
2026-06-24
AI Q&A
2026-06-24
EPSS Evaluated
N/A
NVD
EUVD
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
book_a_room_event_calendar plugin to 1.9 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-352 The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.
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Executive Summary

The Book a Room Event Calendar plugin for WordPress has a Cross-Site Request Forgery (CSRF) vulnerability in all versions up to and including 1.9. This happens because the plugin does not use nonce validation on its settings form and update functions. Specifically, the plugin's options page uses the 'action' POST parameter to call update_settings(), which saves sensitive plugin configuration such as database connection details without verifying that the request is legitimate. Since there is no nonce field generated or checked, an attacker can trick a site administrator into clicking a malicious link that changes these settings without authorization.

Impact Analysis

This vulnerability allows an unauthenticated attacker to modify the plugin's database connection settings by tricking an administrator into performing an action like clicking a link. This could lead to unauthorized changes in the plugin's configuration, potentially compromising the integrity and security of the website's data and operations.

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