CVE-2025-65590
📋 TL;DR
nopCommerce 4.90.0 contains a stored cross-site scripting vulnerability in the blog posts functionality of its content management system. Attackers can inject malicious scripts that execute when administrators view blog posts, potentially compromising administrative accounts. This affects all nopCommerce 4.90.0 installations using the blog functionality.
💻 Affected Systems
- nopCommerce
📦 What is this software?
Nopcommerce by Nopcommerce
⚠️ Risk & Real-World Impact
Worst Case
Administrator account takeover leading to full e-commerce site compromise, data theft, and malware distribution to customers.
Likely Case
Session hijacking of administrative users, defacement of blog content, or credential theft.
If Mitigated
Limited to blog content defacement if administrative accounts have strong authentication and session management.
🎯 Exploit Status
Exploitation requires access to create or edit blog posts, typically requiring at least contributor-level permissions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.90.1 or later
Vendor Advisory: https://www.nopcommerce.com/
Restart Required: No
Instructions:
1. Backup your nopCommerce installation and database. 2. Download nopCommerce 4.90.1 or later from the official website. 3. Replace the affected files with the patched version. 4. Clear the application cache. 5. Test blog functionality.
🔧 Temporary Workarounds
Disable Blog Functionality
allTemporarily disable the blog module to prevent exploitation while waiting to patch.
Navigate to Admin > Configuration > Plugins > Local plugins > Find 'Blog' plugin > Click 'Edit' > Set 'Is plugin active?' to No
Input Validation Filter
allImplement server-side input validation for blog post content to strip or encode script tags.
Modify blog post handling code to sanitize HTML input using libraries like HtmlSanitizer or AntiXSS
🧯 If You Can't Patch
- Restrict blog post creation/editing permissions to trusted administrators only.
- Implement Content Security Policy (CSP) headers to restrict script execution from untrusted sources.
🔍 How to Verify
Check if Vulnerable:
Check if nopCommerce version is 4.90.0 and blog functionality is enabled. Attempt to create a blog post with <script>alert('XSS')</script> and see if it executes when viewed.Check Version:
Check Admin > Configuration > System Information > nopCommerce versionVerify Fix Applied:
After patching, attempt the same XSS payload in blog posts and verify it's properly sanitized or blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual blog post creation/modification patterns
- Administrative session anomalies after blog post views
Network Indicators:
- Unexpected script loads from blog post URLs
- Suspicious outbound connections from administrative sessions
SIEM Query:
source="nopcommerce" AND (event="blog_post_created" OR event="blog_post_modified") AND content CONTAINS "<script>"