CVE-2024-13731
📋 TL;DR
This vulnerability allows authenticated WordPress users with contributor-level access or higher to inject malicious scripts into website pages using the Alert Box Block plugin. When visitors view pages containing these injected scripts, the scripts execute in their browsers, potentially stealing credentials or performing unauthorized actions. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- Alert Box Block – Display notice/alerts in the front end WordPress plugin
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, redirect users to malicious sites, deface websites, or perform actions on behalf of authenticated users, potentially leading to complete site compromise.
Likely Case
Attackers with contributor access inject malicious scripts that steal visitor cookies or session tokens, leading to account takeover of regular users.
If Mitigated
With proper input validation and output escaping, malicious scripts would be neutralized before execution, preventing any impact.
🎯 Exploit Status
Exploitation requires authenticated access but is technically simple once an attacker has contributor credentials.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.1.3 or later
Vendor Advisory: https://wordpress.org/plugins/alert-box-block/#developers
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Alert Box Block' and click 'Update Now'. 4. Verify the plugin version is 1.1.3 or higher.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate alert-box-block
Restrict User Roles
allRemove contributor-level access from untrusted users
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads
- Enable Content Security Policy (CSP) headers to restrict script execution
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for Alert Box Block version 1.1.2 or lowerCheck Version:
wp plugin get alert-box-block --field=versionVerify Fix Applied:
Confirm plugin version is 1.1.3 or higher in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php with alert box parameters
- Multiple failed login attempts followed by successful contributor login
Network Indicators:
- Outbound connections to suspicious domains from your WordPress site
- Unusual JavaScript payloads in HTTP requests
SIEM Query:
source="wordpress.log" AND ("alert-box" OR "alert_box") AND ("script" OR "javascript" OR "onerror")