CVE-2024-43946
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the SKT Blocks WordPress plugin allows attackers to inject malicious scripts into web pages that are then executed when other users view those pages. The vulnerability affects all WordPress sites using SKT Blocks plugin versions up to 1.5. Attackers can steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- SKT Blocks – Gutenberg based Page Builder WordPress plugin
📦 What is this software?
Skt Blocks by Sktthemes
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, take over the WordPress site, install backdoors, deface the website, or use the compromised site to attack visitors.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies, redirect users to phishing sites, or perform unauthorized actions on behalf of logged-in users.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before being stored or displayed to users.
🎯 Exploit Status
Stored XSS vulnerabilities in WordPress plugins are frequently exploited in the wild. Attackers typically need some level of access to inject the payload.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6 or later
Vendor Advisory: https://patchstack.com/database/vulnerability/skt-blocks/wordpress-skt-blocks-plugin-1-5-cross-site-scripting-xss-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Go to Plugins → Installed Plugins. 3. Find SKT Blocks plugin. 4. Click 'Update Now' if update is available. 5. Alternatively, download version 1.6+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable SKT Blocks Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate skt-blocks
Implement Content Security Policy
allAdd CSP headers to restrict script execution
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Or add to WordPress functions.php: header("Content-Security-Policy: default-src 'self'; script-src 'self'");
🧯 If You Can't Patch
- Remove the SKT Blocks plugin completely and use alternative page builders
- Implement web application firewall (WAF) rules to block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins → SKT Blocks version. If version is 1.5 or lower, you are vulnerable.Check Version:
wp plugin get skt-blocks --field=versionVerify Fix Applied:
After update, verify SKT Blocks plugin shows version 1.6 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php or admin-post.php with script tags
- Multiple failed login attempts followed by successful plugin modification
Network Indicators:
- Outbound connections to suspicious domains from your WordPress server
- Unusual JavaScript payloads in HTTP requests
SIEM Query:
source="wordpress.log" AND ("skt-blocks" OR "admin-ajax.php") AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")