CVE-2025-8340
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts via the email parameter in the fill_details.php file of Intern Membership Management System 1.0. When exploited, it enables cross-site scripting attacks that can steal user sessions, redirect users, or deface websites. Organizations using this specific software version are affected.
💻 Affected Systems
- Intern Membership Management System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator credentials, take over the system, and compromise all member data, potentially leading to data breaches and complete system compromise.
Likely Case
Attackers steal user session cookies to impersonate legitimate users, redirect users to malicious sites, or deface the membership portal.
If Mitigated
With proper input validation and output encoding, the attack fails to execute malicious scripts, limiting impact to attempted exploitation logs.
🎯 Exploit Status
Exploit code is publicly available on GitHub; attack requires minimal technical skill to execute.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Implement workarounds or consider alternative software.
🔧 Temporary Workarounds
Input Validation and Sanitization
allAdd server-side validation and sanitization for email parameter in fill_details.php
Modify fill_details.php to include: $email = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL); and htmlspecialchars() for output
Content Security Policy
allImplement CSP headers to restrict script execution sources
Add to .htaccess or server config: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Add to PHP: header("Content-Security-Policy: default-src 'self'; script-src 'self'");
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) with XSS protection rules
- Disable or restrict access to fill_details.php if not essential
🔍 How to Verify
Check if Vulnerable:
Test by submitting <script>alert('XSS')</script> in email field of fill_details.php form and check if script executesCheck Version:
Check software version in admin panel or review source code comments for version 1.0Verify Fix Applied:
After implementing fixes, test with same payload and verify script does not execute; check server logs for sanitized input📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to fill_details.php with script tags in email parameter
- Multiple failed login attempts following XSS payload submissions
Network Indicators:
- HTTP requests containing <script> tags in POST data
- Unusual outbound connections from application server after XSS exploitation
SIEM Query:
source="web_logs" AND uri="/fill_details.php" AND (email CONTAINS "<script>" OR email CONTAINS "javascript:")