CVE-2025-49963
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into web pages generated by the Simple Stripe Checkout WordPress plugin. When users visit a specially crafted URL, the scripts execute in their browsers, potentially stealing session cookies or performing actions on their behalf. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- Simple Stripe Checkout 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 steal administrator session cookies, take over WordPress sites, install backdoors, or redirect users to malicious sites to steal credentials and financial information.
Likely Case
Attackers steal user session cookies or credentials through phishing links, potentially compromising user accounts and performing unauthorized actions.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users' browsers, preventing exploitation.
🎯 Exploit Status
Reflected XSS vulnerabilities are commonly exploited and require minimal technical skill to weaponize.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 1.1.28
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Simple Stripe Checkout. 4. Click 'Update Now' if available. 5. If no update appears, manually download latest version from WordPress.org and replace plugin files.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the Simple Stripe Checkout plugin until patched
wp plugin deactivate simple-stripe-checkout
Web Application Firewall (WAF)
allConfigure WAF rules to block XSS payloads targeting the vulnerable endpoint
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Use browser security extensions that block reflected XSS attacks
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Plugins > Simple Stripe Checkout version numberCheck Version:
wp plugin get simple-stripe-checkout --field=versionVerify Fix Applied:
Verify plugin version is greater than 1.1.28 and test with XSS payloads📡 Detection & Monitoring
Log Indicators:
- Unusual GET/POST requests containing script tags or JavaScript code
- Requests to plugin endpoints with suspicious parameters
Network Indicators:
- HTTP requests containing <script>, javascript:, or encoded XSS payloads
SIEM Query:
source="wordpress.log" AND ("simple-stripe-checkout" OR "ssc_") AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")