CVE-2024-6930 – The WP Booking Calendar plugin for WordPress ha... (How to Fix)

📋 TL;DR

The WP Booking Calendar plugin for WordPress has a stored XSS vulnerability in its bookingform shortcode. Authenticated attackers with contributor-level access or higher can inject malicious scripts that execute when users view compromised pages. This affects all WordPress sites using vulnerable plugin versions.

💻 Affected Systems

Products:

WP Booking Calendar WordPress Plugin

Versions: All versions up to and including 10.2.1

Operating Systems: All

Default Config Vulnerable: ⚠️ Yes

Notes: Requires WordPress installation with vulnerable plugin version and at least one user with contributor-level access.

📦 What is this software?

Booking Calendar by Wpbookingcalendar

View all CVEs affecting Booking Calendar →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Attackers could steal admin credentials, redirect users to malicious sites, deface websites, or install backdoors leading to complete site compromise.

🟠

Likely Case

Attackers inject malicious scripts to steal user session cookies, redirect users to phishing pages, or display unwanted content.

🟢

If Mitigated

With proper user role management and content filtering, impact is limited to potential defacement of specific pages.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: LIKELY

Unauthenticated Exploit: ✅ No

Complexity: LOW

Exploitation requires authenticated access but is technically simple once access is obtained.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 10.2.2 or later

Vendor Advisory: https://wordpress.org/plugins/booking/#developers

Restart Required: No

Instructions:

1. Log into WordPress admin panel
2. Navigate to Plugins → Installed Plugins
3. Find WP Booking Calendar
4. Click 'Update Now' if available
5. If no update appears, manually download version 10.2.2+ from WordPress.org
6. Deactivate, delete old version, upload new version, activate

🔧 Temporary Workarounds

Remove Contributor Access

all

Temporarily remove contributor-level access from untrusted users

Disable Plugin

all

Deactivate WP Booking Calendar plugin until patched

🧯 If You Can't Patch

Implement strict user role management - only grant contributor access to trusted users
Install and configure a web application firewall (WAF) with XSS protection rules

🔍 How to Verify

Check if Vulnerable:

Check WordPress admin → Plugins → Installed Plugins → WP Booking Calendar version

Check Version:

wp plugin list --name=booking --field=version

Verify Fix Applied:

Verify plugin version is 10.2.2 or higher after update

📡 Detection & Monitoring

Log Indicators:

Unusual POST requests to wp-admin with bookingform shortcode parameters
Multiple page edits by contributor-level users

Network Indicators:

Script tags with unusual attributes in bookingform shortcodes

SIEM Query:

source="wordpress" AND ("bookingform" AND "type=" AND ("script" OR "onerror" OR "onload"))

📊 Metadata

CVE ID: CVE-2024-6930

CVSS v3 Score: 6.4 (MEDIUM)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CWE: CWE-79

Published: July 24, 2024

Last Updated: November 21, 2024

🔗 References

https://plugins.trac.wordpress.org/browser/booking/trunk/core/lib/wpdev-booking-class.php#L849 Patch
https://plugins.trac.wordpress.org/changeset/3123628/ Patch
https://wordpress.org/plugins/booking/#developers Product,Release Notes
https://www.wordfence.com/threat-intel/vulnerabilities/id/2aaca776-03ce-43bb-9553-f455f57124a3?source=cve Third Party Advisory
https://plugins.trac.wordpress.org/browser/booking/trunk/core/lib/wpdev-booking-class.php#L849 Patch
https://plugins.trac.wordpress.org/changeset/3123628/ Patch
https://wordpress.org/plugins/booking/#developers Product,Release Notes
https://www.wordfence.com/threat-intel/vulnerabilities/id/2aaca776-03ce-43bb-9553-f455f57124a3?source=cve Third Party Advisory

📤 Share & Export

📄 Export Markdown 📋 Export JSON

🔗 Related Vulnerabilities

If you're affected by CVE-2024-6930, you might also want to check these: