CVE-2025-48258
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the Mega Menu Block WordPress plugin allows attackers to inject malicious scripts into web pages. When exploited, these scripts execute in victims' browsers, potentially stealing session cookies or performing actions on their behalf. All WordPress sites using vulnerable versions of the Mega Menu Block plugin are affected.
💻 Affected Systems
- WordPress Mega Menu Block 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 session cookies, take over WordPress sites, deface websites, or redirect visitors to malicious sites, potentially leading to complete site compromise and data theft.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies or credentials, potentially gaining unauthorized access to WordPress admin panels or user accounts.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users' browsers, preventing exploitation.
🎯 Exploit Status
Stored XSS vulnerabilities typically require some level of access to inject malicious content, but once injected, the payload executes for all users visiting the affected page.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.7 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Mega Menu Block' and click 'Update Now'. 4. If update not available, download version 1.0.7+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable Mega Menu Block plugin
allTemporarily deactivate the vulnerable plugin until patched
wp plugin deactivate mega-menu-block
Implement Content Security Policy
allAdd CSP headers to restrict script execution sources
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Or add to wp-config.php: header("Content-Security-Policy: default-src 'self'; script-src 'self'");
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads in menu content
- Disable user input in menu fields or implement strict input validation
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for Mega Menu Block version. If version is 1.0.6 or lower, you are vulnerable.Check Version:
wp plugin get mega-menu-block --field=versionVerify Fix Applied:
After updating, verify plugin version shows 1.0.7 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to menu update endpoints
- Suspicious JavaScript in menu content fields
- Multiple failed login attempts following menu updates
Network Indicators:
- Outbound connections to suspicious domains from your WordPress site
- Unexpected script tags in HTTP responses containing menu content
SIEM Query:
source="wordpress.log" AND ("mega-menu" OR "menu-block") AND ("update" OR "save") AND ("script" OR "javascript" OR "onclick")