CVE-2024-8500
📋 TL;DR
The WP Shortcodes Plugin — Shortcodes Ultimate for WordPress has a stored XSS vulnerability that allows authenticated attackers with Contributor-level access or higher to inject malicious scripts into pages. These scripts execute whenever users view the compromised pages, potentially affecting all visitors to vulnerable WordPress sites.
💻 Affected Systems
- WP Shortcodes Plugin — Shortcodes Ultimate
📦 What is this software?
Shortcodes Ultimate by Getshortcodes
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, redirect users to malicious sites, deface websites, or perform actions on behalf of authenticated users.
Likely Case
Attackers with contributor accounts inject malicious scripts that steal user data or perform limited malicious actions on affected pages.
If Mitigated
With proper input validation and output escaping, the vulnerability would be prevented, and only properly sanitized content would be displayed.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once an attacker has contributor-level credentials.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.2.3
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3171844/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Shortcodes Ultimate' and click 'Update Now'. 4. Verify version is 7.2.3 or higher.
🔧 Temporary Workarounds
Remove Contributor Access
allTemporarily remove contributor-level access for untrusted users until patching is complete.
Disable Plugin
allDeactivate the Shortcodes Ultimate plugin if not essential for site functionality.
🧯 If You Can't Patch
- Implement strict input validation and output escaping at the application level
- Use web application firewall rules to block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Installed Plugins → Shortcodes Ultimate version. If version is 7.2.2 or lower, you are vulnerable.Check Version:
wp plugin list --name='Shortcodes Ultimate' --field=versionVerify Fix Applied:
After updating, confirm version is 7.2.3 or higher in the WordPress plugins list.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php with script tags
- Multiple failed login attempts followed by successful contributor login
Network Indicators:
- Inbound traffic containing script tags to WordPress endpoints
- Outbound connections to suspicious domains after page loads
SIEM Query:
source="wordpress.log" AND ("shortcodes" OR "su_") AND ("script" OR "onerror" OR "javascript:")