CVE-2025-54036: Webba Booking Lite CSRF Vulnerability

CVE-2025-54036 Overview

CVE-2025-54036 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the Webba Appointment Booking plugin (webba-booking-lite) for WordPress. The flaw exists in all plugin versions up to and including 5.1.20. An attacker can craft a malicious web page that, when visited by an authenticated site user, triggers unintended state-changing actions in the plugin. The weakness is tracked under CWE-352: Cross-Site Request Forgery. Exploitation requires user interaction such as clicking a link or loading attacker-controlled content while authenticated to the target WordPress site.

Critical Impact
Successful exploitation lets attackers perform unauthorized actions in the Webba Booking plugin on behalf of an authenticated user, resulting in limited integrity impact to booking data.

Affected Products

Webba Appointment Booking (webba-booking-lite) WordPress plugin
All versions from initial release through 5.1.20
WordPress installations with the vulnerable plugin activated

Discovery Timeline

2025-07-16 - CVE-2025-54036 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-54036

Vulnerability Analysis

The vulnerability is a Cross-Site Request Forgery (CSRF) flaw in the Webba Booking plugin. The plugin exposes one or more state-changing endpoints that do not validate the origin of incoming requests. An attacker can craft a page containing a forged request. When an authenticated administrator or privileged user loads that page, the browser forwards their session cookies with the request, causing the plugin to execute the action as if it were legitimate.

The issue is limited to actions that require user interaction (UI:R in the CVSS vector), and the scope of impact is bounded to integrity of booking-related data. Confidentiality and availability are not directly affected. The EPSS score reported for this CVE is 0.128%, indicating a low predicted likelihood of exploitation in the short term.

Root Cause

The root cause is the absence or improper validation of anti-CSRF tokens (WordPress nonces) on request handlers that modify plugin state. WordPress provides the wp_nonce_field() and check_admin_referer() primitives to prevent forged requests, and failure to enforce these controls on privileged endpoints leaves the plugin exposed to CSRF as defined by [CWE-352].

Attack Vector

The attack is delivered over the network. An attacker hosts a malicious page or injects HTML into a site the victim visits. The page issues an HTTP request to the vulnerable WordPress endpoint, either through an auto-submitting form or a resource load. If the victim is authenticated to the target site, the request is processed with the victim's privileges. No credentials are required from the attacker, but the victim must interact with the malicious content.

See the Patchstack Vulnerability Report for additional technical detail.

Detection Methods for CVE-2025-54036

Indicators of Compromise

Unexpected changes to Webba Booking configuration, services, or appointment records without corresponding admin activity in access logs
HTTP POST requests to webba-booking-lite admin-ajax or REST endpoints with Referer headers pointing to external, untrusted domains
Booking data modifications occurring immediately after an administrator visited an external URL

Detection Strategies

Review WordPress access logs for state-changing requests to plugin endpoints that lack a valid _wpnonce parameter
Correlate administrator browsing activity with plugin write actions to identify requests likely triggered by cross-origin content
Deploy a web application firewall rule that flags requests to webba-booking-lite endpoints with missing or mismatched Origin/Referer headers

Monitoring Recommendations

Enable WordPress audit logging for all plugin administrative actions and export logs to a central SIEM
Alert on modifications to Webba Booking settings outside approved change windows
Monitor for outbound requests from administrator workstations to newly registered or low-reputation domains that precede plugin state changes

How to Mitigate CVE-2025-54036

Immediate Actions Required

Update the Webba Appointment Booking plugin to a version later than 5.1.20 as soon as a fixed release is published by the vendor
Restrict administrative access to the WordPress dashboard by IP allowlist where operationally feasible
Require administrators to log out of WordPress before browsing untrusted sites, or use a dedicated browser profile for admin work

Patch Information

At the time of publication, the vulnerability affects the plugin through version 5.1.20. Consult the Patchstack Vulnerability Report and the plugin's changelog on WordPress.org for the fixed version number and upgrade instructions.

Workarounds

Deactivate the Webba Booking plugin until a patched version is installed if booking functionality is not business-critical
Deploy a web application firewall rule that blocks requests to plugin endpoints when the Referer or Origin header is absent or does not match the site's domain
Enforce SameSite cookie attributes on WordPress authentication cookies to reduce cross-site request delivery

bash

# Example WAF rule (ModSecurity) to block cross-origin POSTs to the plugin
SecRule REQUEST_METHOD "@streq POST" \
  "chain,phase:1,deny,status:403,id:1005400,msg:'CSRF: cross-origin POST to webba-booking-lite'"
SecRule REQUEST_URI "@contains /wp-admin/admin-ajax.php" \
  "chain"
SecRule ARGS:action "@beginsWith wbk_" \
  "chain"
SecRule REQUEST_HEADERS:Origin "!@beginsWith https://your-site.example"