CVE-2024-4749
📋 TL;DR
This vulnerability in the wp-eMember WordPress plugin allows attackers to inject malicious scripts via the 'fieldId' parameter, which are then executed in victims' browsers when they visit a specially crafted URL. It affects WordPress sites running wp-eMember plugin versions before 10.3.9. The attack requires user interaction but can lead to session hijacking, credential theft, or redirection to malicious sites.
💻 Affected Systems
- wp-eMember WordPress Plugin
📦 What is this software?
Wp Emember by Tipsandtricks Hq
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator session cookies, gain full control of the WordPress site, install backdoors, deface the site, or pivot to internal networks.
Likely Case
Attackers steal user session cookies or credentials through phishing links, potentially compromising user accounts and sensitive data.
If Mitigated
With proper web application firewalls and security headers, the attack is blocked or mitigated, limiting impact to failed exploitation attempts.
🎯 Exploit Status
Exploitation requires crafting a malicious URL with JavaScript payload in the fieldId parameter and tricking users into clicking it.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 10.3.9
Vendor Advisory: https://wpscan.com/vulnerability/6cc05a33-6592-4d35-8e66-9b6a9884df7e/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'wp-eMember' and check if version is below 10.3.9. 4. Click 'Update Now' if available, or manually update via FTP/SSH. 5. Verify plugin version shows 10.3.9 or higher.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rule
allBlock requests containing suspicious JavaScript patterns in the fieldId parameter.
Depends on WAF platform - configure rule to block fieldId parameter with script tags or JavaScript functions
Content Security Policy (CSP)
allImplement CSP headers to restrict script execution sources.
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Or configure in web server settings
🧯 If You Can't Patch
- Disable the wp-eMember plugin immediately via WordPress admin or by renaming plugin directory
- Implement strict input validation at application level to sanitize all user inputs
🔍 How to Verify
Check if Vulnerable:
Check wp-eMember plugin version in WordPress admin under Plugins > Installed Plugins. If version is below 10.3.9, the site is vulnerable.Check Version:
wp plugin list --name=wp-eMember --field=version (if WP-CLI installed) or check WordPress admin panelVerify Fix Applied:
Confirm plugin version shows 10.3.9 or higher in WordPress admin. Test by attempting to inject simple alert script in fieldId parameter (in controlled environment).📡 Detection & Monitoring
Log Indicators:
- HTTP requests with fieldId parameter containing script tags or JavaScript functions
- Unusual GET requests to wp-eMember endpoints with long parameter values
Network Indicators:
- Outbound connections to suspicious domains following visits to crafted URLs
- Multiple failed XSS attempts in web server logs
SIEM Query:
source="web_server" fieldId=*script* OR fieldId=*javascript* OR fieldId=*alert(*