CVE-2025-57977
📋 TL;DR
A Cross-Site Request Forgery (CSRF) vulnerability in the Flexible PDF Invoices for WooCommerce & WordPress plugin allows attackers to trick authenticated administrators into performing unintended actions. This affects all WordPress sites using the plugin from any version up to 6.0.13. Attackers could modify invoice settings or potentially perform other administrative actions without the victim's knowledge.
💻 Affected Systems
- Flexible PDF Invoices for WooCommerce & WordPress
⚠️ 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 reconfigure invoice settings, modify business information, or potentially chain with other vulnerabilities to gain further access to the WordPress site or WooCommerce store.
Likely Case
Attackers trick administrators into changing invoice templates, payment settings, or business details, causing operational disruption or financial impact.
If Mitigated
With proper CSRF protections and user awareness, the risk is limited to unsuccessful exploitation attempts that are logged and monitored.
🎯 Exploit Status
CSRF attacks are well-understood and relatively easy to execute. Requires the victim to be logged into WordPress as an administrator and visit a malicious page.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.0.14 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Flexible PDF Invoices for WooCommerce & WordPress'. 4. Click 'Update Now' if available. 5. Alternatively, download version 6.0.14+ from WordPress.org and manually update.
🔧 Temporary Workarounds
Implement CSRF Tokens Manually
allAdd nonce verification to plugin forms if you cannot update immediately
Requires PHP coding knowledge to modify plugin files
Use Security Plugins
allInstall WordPress security plugins that add CSRF protection
🧯 If You Can't Patch
- Temporarily disable the plugin if not critically needed
- Implement strict access controls and monitor administrator activity logs
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Plugins > Flexible PDF Invoices for WooCommerce & WordPress. If version is 6.0.13 or lower, you are vulnerable.Check Version:
wp plugin get flexible-invoices --field=versionVerify Fix Applied:
After updating, verify the plugin version shows 6.0.14 or higher in WordPress admin.📡 Detection & Monitoring
Log Indicators:
- Unexpected POST requests to /wp-admin/admin.php?page=flexible-invoices from unusual referrers
- Multiple failed CSRF token validations in WordPress debug logs
Network Indicators:
- HTTP requests with missing or invalid nonce parameters to invoice-related endpoints
SIEM Query:
source="wordpress" AND (uri_path="/wp-admin/admin.php" AND query_string="page=flexible-invoices") AND http_method="POST" AND NOT referrer CONTAINS yourdomain.com