CVE-2026-9721— Book a Room Event Calendar <= 1.9 - Cross-Site Request Forgery to Settings Update
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| chuhpl | Book a Room Event Calendar | ≤ 1.9 | affected |
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I. Basic Information for CVE-2026-9721
Vulnerability Information
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Vulnerability Title
Book a Room Event Calendar <= 1.9 - Cross-Site Request Forgery to Settings Update
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨站请求伪造(CSRF)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cleveland Heights-University Heights Public Library Webdeveloper Book a Room Event Calendar 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cleveland Heights-University Heights Public Library Webdeveloper Book a Room Event Calendar是Cleveland Heights-University Heights Public Library Webdeveloper个人开发者的一款活动日历预订插件。 Cleveland Heights-University Heights Public Library Webdeveloper Book a Room Even
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| chuhpl | Book a Room Event Calendar | 0 ~ 1.9 | - |
II. Public POCs for CVE-2026-9721
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-9721 (2)
Security Blog Posts for CVE-2026-9721 (1)
Other References for CVE-2026-9721 (1)
IV. Related Vulnerabilities
Same weakness: CWE-352
- CVE-2026-15080
Ray Enterprise Translation - Moderately critical - Cross sit - CVE-2026-13243
Salesforce Suite - Moderately critical - Cross-site request - CVE-2026-38057
ST Engineering iDirect iQ-Series Terminals Cross-Site reques - CVE-2026-6440
GoodMeet <= 1.1.8 - Cross-Site Request Forgery to Google Mee - CVE-2026-15070
Salon Booking System <= 10.30.32 - Cross-Site Request Forger
V. Comments for CVE-2026-9721
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