CVE-2024-37262
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into web pages generated by the vCita Online Booking & Scheduling Calendar WordPress plugin. When users visit a specially crafted URL, the script executes in their browser, potentially stealing session cookies or performing actions on their behalf. All WordPress sites using affected versions of this plugin are vulnerable.
💻 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, take over WordPress sites, deface websites, or redirect users to malicious sites, potentially leading to complete site compromise.
Likely Case
Attackers steal user session cookies or credentials, perform actions as authenticated users, or redirect users to phishing pages.
If Mitigated
With proper input validation and output encoding, the malicious scripts would be neutralized before reaching users' browsers.
🎯 Exploit Status
Reflected XSS typically requires user interaction (clicking a malicious link) but is straightforward to exploit once the vulnerable parameter is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.4.3 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Online Booking & Scheduling Calendar by vcita'. 4. Click 'Update Now' if available, or download latest version from WordPress repository. 5. Activate updated plugin.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily disable the vCita plugin until patched
wp plugin deactivate meeting-scheduler-by-vcita
Implement WAF rules
allAdd web application firewall rules to block XSS payloads targeting vCita endpoints
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Use browser security extensions that block reflected XSS attacks
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for 'Online Booking & Scheduling Calendar by vcita' version 4.4.2 or earlierCheck Version:
wp plugin get meeting-scheduler-by-vcita --field=versionVerify Fix Applied:
Verify plugin version is 4.4.3 or later in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual GET/POST requests containing script tags or JavaScript payloads to vCita plugin endpoints
- Multiple failed XSS attempts in web server logs
Network Indicators:
- HTTP requests with suspicious parameters containing <script>, javascript:, or encoded payloads
SIEM Query:
source="web_logs" AND (uri_path="*vcita*" OR uri_path="*meeting-scheduler*") AND (http_method="GET" OR http_method="POST") AND (query="*<script>*" OR query="*javascript:*" OR query="*%3Cscript%3E*")🔗 References
- https://patchstack.com/database/vulnerability/meeting-scheduler-by-vcita/wordpress-online-booking-scheduling-calendar-plugin-4-4-2-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve
- https://patchstack.com/database/vulnerability/meeting-scheduler-by-vcita/wordpress-online-booking-scheduling-calendar-plugin-4-4-2-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve
