CVE-2025-54676
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the vcita Online Booking & Scheduling Calendar WordPress plugin allows attackers to inject malicious scripts into web pages that are then executed when other users view those pages. WordPress administrators and users who can access the booking/scheduling functionality are affected. The vulnerability exists in versions up to 4.5.3 of the plugin.
💻 Affected Systems
- Online Booking & Scheduling Calendar for WordPress by vcita
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator session cookies, perform actions as administrators, deface websites, or redirect users to malicious sites, potentially leading to complete site compromise.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies or credentials, potentially gaining administrative access to the WordPress site.
If Mitigated
With proper input validation and output encoding, the malicious scripts would be neutralized and rendered harmless as text rather than executable code.
🎯 Exploit Status
Exploitation requires the ability to interact with the booking/scheduling functionality, which typically requires some level of access to the WordPress site.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 4.5.3
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Online Booking & Scheduling Calendar for WordPress by vcita'. 4. Click 'Update Now' if update is available. 5. If no update appears, manually download latest version from WordPress.org and replace plugin files.
🔧 Temporary Workarounds
Disable vulnerable plugin
WordPressTemporarily disable the vcita booking plugin until patched
wp plugin deactivate online-booking-scheduling-calendar-for-wordpress-by-vcita
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Use web application firewall (WAF) rules to block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Plugins > Installed Plugins for 'Online Booking & Scheduling Calendar for WordPress by vcita' version 4.5.3 or earlierCheck Version:
wp plugin get online-booking-scheduling-calendar-for-wordpress-by-vcita --field=versionVerify Fix Applied:
Verify plugin version is higher than 4.5.3 in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to booking/scheduling endpoints with script tags or JavaScript payloads
- Multiple failed attempts to access booking functionality
Network Indicators:
- HTTP requests containing script tags or JavaScript in booking-related parameters
- Unusual outbound connections from WordPress site after booking form submissions
SIEM Query:
source="wordpress" AND (uri_path="*booking*" OR uri_path="*scheduling*") AND (http_method="POST") AND (request_body="*<script>*" OR request_body="*javascript:*")