CVE-2025-66845
📋 TL;DR
A reflected Cross-Site Scripting vulnerability in TechStore version 1.0 allows attackers to inject malicious JavaScript via the id parameter in the user_name endpoint. This vulnerability affects all users accessing the vulnerable TechStore application, potentially leading to session hijacking, credential theft, or malware delivery.
💻 Affected Systems
- TechStore
📦 What is this software?
Techstore by Nooncarlett
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator credentials, gain full control of the TechStore application, and compromise all user data including payment information.
Likely Case
Attackers steal user session cookies to impersonate legitimate users, potentially accessing personal information and performing unauthorized actions.
If Mitigated
With proper input validation and output encoding, the vulnerability is eliminated and no exploitation is possible.
🎯 Exploit Status
The GitHub gist contains proof-of-concept code demonstrating exploitation. Reflected XSS vulnerabilities are commonly weaponized in phishing campaigns.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
1. Contact TechStore vendor for patch availability
2. If patch is available, download and apply according to vendor instructions
3. Test the fix in a non-production environment first
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rule
allImplement WAF rules to block malicious scripts in the id parameter
# Example ModSecurity rule: SecRule ARGS:id "@rx <script" "id:1001,phase:2,deny,status:403,msg:'XSS attempt detected'"
# Example naxsi rule: MainRule "str:<script" "msg:XSS script tag" "mz:ARGS:id" "s:$XSS:8" id:1001;
Input Validation Filter
allImplement server-side input validation to sanitize the id parameter
# PHP example: $id = htmlspecialchars($_GET['id'], ENT_QUOTES, 'UTF-8');
# Python Flask example: id_param = escape(request.args.get('id', ''))
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Disable or restrict access to the vulnerable user_name endpoint
🔍 How to Verify
Check if Vulnerable:
Test by accessing the vulnerable endpoint with a simple XSS payload: http://target/user_name?id=<script>alert('XSS')</script>Check Version:
Check TechStore version in admin panel or configuration filesVerify Fix Applied:
Retest with the same payload after applying fixes. The script should not execute and should be properly encoded in the output.📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing script tags or JavaScript code in id parameter
- Unusual number of requests to user_name endpoint
Network Indicators:
- HTTP traffic with suspicious parameters containing JavaScript code
- Requests to user_name endpoint with encoded payloads
SIEM Query:
source="web_logs" AND uri="/user_name" AND (query="*<script*" OR query="*javascript:*" OR query="*onload=*" OR query="*onerror=*")