CVE-2025-23659
📋 TL;DR
This CVE describes a Cross-Site Request Forgery (CSRF) vulnerability in the Hernan Javier Hegykozi MercadoLibre Integration WordPress plugin that can lead to stored cross-site scripting (XSS). Attackers can trick authenticated administrators into executing malicious actions, potentially injecting persistent scripts into the website. WordPress sites using this plugin version 1.1 or earlier are affected.
💻 Affected Systems
- Hernan Javier Hegykozi MercadoLibre Integration 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
Complete site compromise through persistent XSS payloads leading to admin account takeover, data theft, and malware distribution to visitors.
Likely Case
Unauthorized plugin configuration changes, injection of malicious scripts that steal session cookies or redirect users to phishing sites.
If Mitigated
Limited impact with proper CSRF tokens and XSS protections in place, potentially only affecting plugin functionality.
🎯 Exploit Status
Exploitation requires social engineering to trick an authenticated admin into clicking a malicious link while logged in.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 1.1 (check plugin repository for latest)
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'MercadoLibre Integration' and update to latest version. 4. If no update available, deactivate and remove the plugin.
🔧 Temporary Workarounds
Implement CSRF Protection
WordPressAdd nonce verification to plugin forms and actions manually if you cannot update immediately.
Requires code modification: Add wp_nonce_field() to forms and wp_verify_nonce() checks in processing scripts.
🧯 If You Can't Patch
- Deactivate and remove the MercadoLibre Integration plugin immediately.
- Implement web application firewall (WAF) rules to block CSRF attempts and XSS payloads.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Plugins > Installed Plugins for 'MercadoLibre Integration' version 1.1 or earlier.Check Version:
wp plugin list --name='mercadolibre-integration' --field=version (if WP-CLI installed)Verify Fix Applied:
Confirm plugin version is updated beyond 1.1 or the plugin is completely removed from the site.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to MercadoLibre Integration admin endpoints without referrer headers or nonce parameters.
- Multiple failed nonce verification attempts in WordPress debug logs.
Network Indicators:
- HTTP requests containing malicious script tags or encoded payloads targeting plugin-specific admin URLs.
SIEM Query:
source="wordpress.log" AND ("mercadolibre" OR "wp-admin/admin-ajax.php") AND ("nonce" OR "csrf")