CVE-2025-53455
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the CashBill WooCommerce payment plugin allows attackers to inject malicious scripts into web pages. When exploited, these scripts execute in victims' browsers, potentially stealing session cookies, redirecting users, or performing actions on their behalf. WordPress sites using the vulnerable CashBill.pl payment plugin versions are affected.
💻 Affected Systems
- CashBill.pl – Płatności WooCommerce
⚠️ 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 admin accounts, install backdoors, deface websites, or redirect users to malicious sites.
Likely Case
Attackers inject malicious scripts that steal user session cookies or redirect users to phishing pages, potentially compromising user accounts and payment information.
If Mitigated
With proper input validation and output encoding, malicious scripts are neutralized before reaching users' browsers, preventing execution.
🎯 Exploit Status
Exploitation requires finding and targeting vulnerable input fields, but no public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 3.2.2 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'CashBill.pl – Płatności WooCommerce'. 4. Click 'Update Now' if available. 5. Alternatively, download latest version from WordPress repository and manually update.
🔧 Temporary Workarounds
Temporary Plugin Deactivation
WordPressDisable the vulnerable plugin until patched, but this will break CashBill payment functionality.
wp plugin deactivate cashbill-payment-method
🧯 If You Can't Patch
- Implement a Web Application Firewall (WAF) with XSS protection rules
- Enable Content Security Policy (CSP) headers to restrict script execution
🔍 How to Verify
Check if Vulnerable:
Check plugin version in WordPress admin under Plugins → Installed Plugins. If version is 3.2.1 or earlier, you are vulnerable.Check Version:
wp plugin get cashbill-payment-method --field=versionVerify Fix Applied:
Verify plugin version is 3.2.2 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to plugin endpoints with script tags in parameters
- Multiple failed login attempts following suspicious requests
Network Indicators:
- HTTP requests containing <script> tags in POST parameters to WooCommerce endpoints
SIEM Query:
source="wordpress.log" AND ("cashbill" OR "woocommerce") AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")