CVE-2023-51303
📋 TL;DR
PHPJabbers Event Ticketing System v1.0 contains multiple HTML injection vulnerabilities in several parameters (lid, name, plugin_sms_api_key, plugin_sms_country_code, title). This allows attackers to inject malicious HTML/JavaScript into web pages, potentially affecting users who access the compromised system. The vulnerability is classified as Cross-Site Scripting (XSS) under CWE-79.
💻 Affected Systems
- PHPJabbers Event Ticketing System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, redirect users to malicious sites, perform actions on behalf of authenticated users, or deface the website.
Likely Case
Most attackers would use this for session hijacking, credential theft, or displaying malicious content to users.
If Mitigated
With proper input validation and output encoding, the impact would be minimal to none.
🎯 Exploit Status
Public exploit details available on Packet Storm. No authentication required to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No vendor advisory found
Restart Required: No
Instructions:
1. Check vendor website for updated version
2. If available, download and install the patched version
3. Replace all vulnerable files with patched versions
4. Clear any cached content
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement server-side validation and sanitization for all user inputs, particularly the vulnerable parameters.
Manual code review and modification of input handling in PHP files
Web Application Firewall (WAF)
allDeploy a WAF with XSS protection rules to block malicious payloads.
Configure WAF rules to detect and block HTML/JavaScript injection attempts
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Disable or restrict access to vulnerable functionality if not required
🔍 How to Verify
Check if Vulnerable:
Test the vulnerable parameters by injecting HTML payloads and checking if they render in the response.Check Version:
Check the application version in the admin panel or by examining source code files.Verify Fix Applied:
After applying fixes, test the same parameters with HTML injection payloads to ensure they are properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual HTML/JavaScript patterns in parameter values
- Multiple requests with encoded payloads
Network Indicators:
- HTTP requests containing script tags or encoded HTML in vulnerable parameters
SIEM Query:
source="web_logs" AND (uri_query="*<script*" OR uri_query="*javascript:*" OR uri_query="*onerror=*" OR uri_query="*onload=*")