CVE-2024-10678
📋 TL;DR
The Ultimate Blocks WordPress plugin before version 3.2.4 contains a stored cross-site scripting (XSS) vulnerability. Users with contributor role or higher can inject malicious scripts into posts/pages, which execute when other users view the content. This affects WordPress sites using vulnerable versions of the plugin.
💻 Affected Systems
- Ultimate Blocks WordPress Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers with contributor access could steal administrator session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users, potentially leading to full site compromise.
Likely Case
Malicious contributors inject advertising scripts, deface content, or steal session data from users viewing affected posts.
If Mitigated
With proper role-based access controls and input validation, impact is limited to content manipulation within contributor permissions.
🎯 Exploit Status
Requires contributor-level access. XSS payloads are simple to craft and execute in vulnerable block options.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.2.4
Vendor Advisory: https://wpscan.com/vulnerability/9342c6a1-4f9a-45f3-911d-0dfee4657243/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Ultimate Blocks plugin. 4. Click 'Update Now' if update available. 5. Alternatively, download version 3.2.4+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Temporary Plugin Deactivation
allDisable Ultimate Blocks plugin until patched
wp plugin deactivate ultimate-blocks
Restrict Contributor Role
allTemporarily remove contributor role permissions or elevate to author role with oversight
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) headers to mitigate XSS impact
- Use web application firewall (WAF) rules to block common XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Ultimate Blocks → Version number. If version is below 3.2.4, system is vulnerable.Check Version:
wp plugin get ultimate-blocks --field=versionVerify Fix Applied:
Confirm Ultimate Blocks plugin version is 3.2.4 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual post/page edits by contributors
- Script tags in post content containing JavaScript
Network Indicators:
- Outbound connections to suspicious domains from post content
- Unexpected script loads from post pages
SIEM Query:
source="wordpress" AND (event="post_updated" OR event="page_updated") AND user_role="contributor" AND content CONTAINS "<script>"