CVE-2025-27355
📋 TL;DR
This CSRF vulnerability in the Woocommerce - Loi Hamon WordPress plugin allows attackers to trick authenticated administrators into performing unintended actions, leading to stored cross-site scripting (XSS). Attackers can inject malicious scripts that execute in victims' browsers when they visit affected pages. This affects all WordPress sites using the vulnerable plugin versions.
💻 Affected Systems
- Woocommerce - Loi Hamon 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 inject persistent malicious scripts that steal administrator credentials, hijack user sessions, deface websites, or redirect users to malicious sites.
Likely Case
Attackers create fake admin actions that inject malicious JavaScript into website content, affecting all visitors who view the compromised pages.
If Mitigated
With proper CSRF protections and content security policies, the attack surface is reduced, though the vulnerability still exists in the codebase.
🎯 Exploit Status
Exploitation requires social engineering to trick an administrator into clicking a malicious link while authenticated. The CSRF leads to stored XSS payload injection.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 1.1.0
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Woocommerce - Loi Hamon' plugin. 4. Click 'Update Now' if available, or manually update to latest version. 5. Verify plugin is updated to version after 1.1.0.
🔧 Temporary Workarounds
Implement CSRF Tokens
WordPressAdd CSRF protection to all admin forms in the plugin
Requires code modification: Add nonce verification to form processing functions
Content Security Policy
allImplement CSP headers to restrict script execution sources
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Or use WordPress security plugins to implement CSP
🧯 If You Can't Patch
- Disable or remove the Woocommerce - Loi Hamon plugin entirely
- Implement strict access controls and monitor administrator account activity for suspicious behavior
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Plugins > Installed Plugins for 'Woocommerce - Loi Hamon'. If version is 1.1.0 or lower, you are vulnerable.Check Version:
wp plugin list --name='loi-hamon' --field=version (if WP-CLI installed) or check WordPress admin plugins pageVerify Fix Applied:
After updating, verify the plugin version shows higher than 1.1.0 in WordPress admin plugins page.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to admin-ajax.php or admin-post.php with loi-hamon parameters
- Multiple failed CSRF token validations in WordPress debug logs
Network Indicators:
- Unexpected outbound connections from your site to external domains following admin actions
- Suspicious referrer headers in requests to admin endpoints
SIEM Query:
source="wordpress.log" AND ("loi-hamon" OR "admin-ajax.php" OR "admin-post.php") AND (POST OR "csrf" OR "nonce")