EUVD-2026-41303
GHSA-4438-c9gx-hx64
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CSRF requires no attacker privileges (PR:N) and no special conditions (AC:L), but victim interaction is mandatory (UI:R); impact is purely availability with no confidentiality or integrity breach.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
Lifecycle Timeline
1DescriptionCVE.org
Unauthenticated Cross Site Request Forgery (CSRF) in Booked <= 3.0.0 versions.
AnalysisAI
Unauthenticated CSRF in Booked WordPress plugin (versions <= 3.0.0) enables remote attackers to trigger availability-impacting actions against authenticated WordPress users without their consent. The CVSS vector (C:N/I:N/A:H) indicates this CSRF leads to a destructive availability outcome - likely deletion or corruption of booking/scheduling data - rather than data theft or code execution. No public exploit or active exploitation has been identified at time of analysis, though the low attack complexity and no required privileges for staging the attack make social-engineering delivery straightforward.
Technical ContextAI
Booked is a WordPress scheduling and appointment booking plugin developed by Themerex (CPE: cpe:2.3:a:themerex:booked:*:*:*:*:*:*:*:*). The vulnerability is classified as CWE-352 (Cross-Site Request Forgery), meaning the plugin fails to validate the origin or authenticity of incoming state-changing HTTP requests. Without anti-CSRF token verification, the plugin blindly processes requests that appear to originate from an authenticated session, even when those requests are actually crafted by a third party and delivered via a malicious webpage. The WordPress plugin architecture is particularly vulnerable to CSRF when nonce checks (wp_verify_nonce) are absent or insufficiently applied on AJAX handlers or admin-facing actions.
RemediationAI
The primary remediation is to update the Booked plugin beyond version 3.0.0 as soon as a patched release is available from Themerex or the WordPress plugin repository; the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/booked/vulnerability/wordpress-booked-plugin-3-0-0-cross-site-request-forgery-csrf-vulnerability should be monitored for the confirmed fixed version, which was not independently confirmed at time of analysis. As an interim compensating control, site administrators can deactivate the Booked plugin entirely if booking functionality is non-critical - this eliminates the attack surface at the cost of scheduling downtime. If deactivation is not acceptable, implementing a web application firewall (WAF) rule to block cross-origin POST requests to Booked plugin endpoints (e.g., via Patchstack's virtual patching feature or Cloudflare WAF) can reduce exposure without requiring plugin downtime. Restricting authenticated administrator sessions to trusted networks via IP allowlisting limits the attacker's ability to find an authenticated target, though this is operationally burdensome on distributed teams.
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External POC / Exploit Code
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