CVE-2024-11141
📋 TL;DR
The Sailthru Triggermail WordPress plugin through version 1.1 contains stored cross-site scripting (XSS) vulnerabilities due to insufficient input sanitization and missing CSRF protection. This allows authenticated subscribers to inject malicious scripts that execute when other users view affected pages, even in WordPress multisite configurations where unfiltered_html is disabled. WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- Sailthru Triggermail WordPress Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator session cookies, redirect users to malicious sites, deface websites, or perform actions on behalf of authenticated users, potentially leading to complete site compromise.
Likely Case
Subscribers inject malicious JavaScript that steals user session cookies or redirects users to phishing pages when they visit affected plugin pages.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before execution, preventing the XSS attack.
🎯 Exploit Status
Requires subscriber-level authentication. Exploitation is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 1.1 (check plugin repository for latest)
Vendor Advisory: https://wpscan.com/vulnerability/6fe3544b-fb86-43e4-9771-6e9343f9f835/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Sailthru Triggermail plugin. 4. Click 'Update Now' if update available. 5. If no update available, deactivate and remove plugin immediately.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patched version is available
wp plugin deactivate sailthru-triggermail
Remove Subscriber XSS Capability
allTemporarily restrict subscriber capabilities to prevent exploitation
wp user remove-role <username> subscriber
wp user add-role <username> contributor
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads in plugin parameters
- Monitor and audit subscriber account activity for suspicious behavior
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for Sailthru Triggermail version 1.1 or earlierCheck Version:
wp plugin get sailthru-triggermail --field=versionVerify Fix Applied:
Verify plugin version is updated beyond 1.1 in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to plugin admin pages
- JavaScript payloads in plugin parameter values
- Multiple failed login attempts followed by successful subscriber login
Network Indicators:
- HTTP requests containing script tags or JavaScript in plugin-related parameters
- Outbound connections to suspicious domains following plugin page visits
SIEM Query:
source="wordpress.log" AND ("sailthru" OR "triggermail") AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")