CVE-2025-65540
📋 TL;DR
Multiple Cross-Site Scripting (XSS) vulnerabilities in xmall v1.1 allow attackers to inject malicious scripts through user input fields like username and description. These scripts execute in victims' browsers when viewing affected pages, potentially stealing session cookies or performing actions on behalf of users. Anyone running xmall v1.1 with user input functionality is affected.
💻 Affected Systems
- xmall
📦 What is this software?
Xmall by Exrick
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator session cookies, gain full administrative access to the application, and potentially compromise the entire system or steal sensitive user data.
Likely Case
Attackers steal user session cookies to hijack accounts, deface pages, or redirect users to malicious sites for credential harvesting.
If Mitigated
Scripts execute but cannot access sensitive data due to proper Content Security Policy or cookie security flags, limiting impact to page defacement.
🎯 Exploit Status
XSS payloads are simple to craft and require no authentication. The GitHub issue shows proof of concept.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://github.com/Exrick/xmall/issues/101
Restart Required: No
Instructions:
1. Monitor the GitHub repository for patches. 2. Apply any available updates. 3. Test functionality after patching.
🔧 Temporary Workarounds
Input Sanitization
allImplement server-side input validation and output encoding for all user-supplied data before rendering in HTML.
Content Security Policy
allDeploy a strict Content Security Policy header to prevent script execution from untrusted sources.
Add header: Content-Security-Policy: default-src 'self'; script-src 'self'
🧯 If You Can't Patch
- Disable or restrict user input fields that are vulnerable
- Implement a web application firewall (WAF) with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Test user input fields (username, description) with XSS payloads like <script>alert('XSS')</script> and check if scripts execute.Check Version:
Check application configuration or documentation for version informationVerify Fix Applied:
Retest with XSS payloads after implementing fixes; scripts should not execute and input should be properly encoded.📡 Detection & Monitoring
Log Indicators:
- Unusual long strings in user input fields
- HTML/script tags in username or description fields
Network Indicators:
- HTTP requests containing script tags or JavaScript in POST parameters
SIEM Query:
source="web_logs" AND ("<script" OR "javascript:" OR "onerror=" OR "onload=")