CVE-2024-6927
📋 TL;DR
The Viral Signup WordPress plugin through version 2.1 contains a stored cross-site scripting (XSS) vulnerability in its settings. This allows authenticated administrators to inject malicious scripts that execute when other users view affected pages, even in WordPress multisite configurations where unfiltered_html capability is restricted. The vulnerability affects WordPress sites using the Viral Signup plugin.
💻 Affected Systems
- WordPress Viral Signup plugin
📦 What is this software?
Viral Signup by Wow Company
⚠️ Risk & Real-World Impact
Worst Case
An attacker with admin privileges could inject malicious JavaScript that steals session cookies, redirects users to phishing sites, or performs actions on behalf of authenticated users, potentially leading to complete site compromise.
Likely Case
Malicious admin injects tracking scripts or defaces the site by modifying plugin settings pages visible to other users.
If Mitigated
Limited impact if only trusted administrators have access and proper input validation is implemented elsewhere.
🎯 Exploit Status
Exploitation requires administrator privileges. Attack involves injecting malicious scripts into plugin settings fields.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 2.2 or later
Vendor Advisory: https://wpscan.com/vulnerability/05024ff5-4c7a-4941-8dae-c1a8d2d4e202/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Viral Signup plugin. 4. Click 'Update Now' if update available. 5. Alternatively, download latest version from WordPress repository and replace plugin files.
🔧 Temporary Workarounds
Disable plugin
allTemporarily deactivate the Viral Signup plugin until patched
wp plugin deactivate viral-signup
Restrict admin access
allLimit administrator accounts to trusted personnel only
🧯 If You Can't Patch
- Remove administrator access from untrusted users
- Implement web application firewall (WAF) rules to block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for Viral Signup version 2.1 or earlierCheck Version:
wp plugin get viral-signup --field=versionVerify Fix Applied:
Verify plugin version is 2.2 or higher in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual modifications to plugin settings
- JavaScript injection patterns in plugin option values
Network Indicators:
- Suspicious script tags in HTTP responses from plugin pages
SIEM Query:
source="wordpress" AND "viral-signup" AND ("update_option" OR "plugin_settings")