CVE-2026-0521
📋 TL;DR
A reflected cross-site scripting vulnerability in TYDAC AG MAP+ allows unauthenticated attackers to craft malicious URLs that execute arbitrary JavaScript in victims' browsers when visited. This affects all users accessing the vulnerable PDF export functionality, potentially compromising their sessions and data.
💻 Affected Systems
- TYDAC AG MAP+
📦 What is this software?
Map\+ by Tydac
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal session cookies, perform actions as authenticated users, redirect to phishing sites, or install malware through drive-by downloads.
Likely Case
Session hijacking, credential theft, or redirection to malicious sites through crafted phishing links.
If Mitigated
Limited impact if proper input validation and output encoding are implemented, though some user interaction risk remains.
🎯 Exploit Status
Attack requires user interaction (clicking malicious link) but is trivial to craft once vulnerability details are known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.tydac.ch/en/mapplus/
Restart Required: No
Instructions:
Check vendor website for security updates. Apply any available patches following vendor instructions.
🔧 Temporary Workarounds
Input Validation and Output Encoding
allImplement proper input validation and output encoding for all user-supplied data in PDF export functionality.
Content Security Policy
allImplement strict Content Security Policy headers to restrict script execution.
🧯 If You Can't Patch
- Disable PDF export functionality if not required
- Implement WAF rules to detect and block XSS payloads in URLs
🔍 How to Verify
Check if Vulnerable:
Test PDF export functionality with XSS payloads in URL parameters. Check if scripts execute in response.Check Version:
Check MAP+ version in application interface or configuration files.Verify Fix Applied:
Retest with same payloads after remediation. Scripts should be properly encoded and not execute.📡 Detection & Monitoring
Log Indicators:
- Unusual URL parameters containing script tags or JavaScript in PDF export requests
- Multiple failed PDF generation attempts with suspicious parameters
Network Indicators:
- HTTP requests to PDF export endpoints with encoded script payloads in query strings
SIEM Query:
source="web_logs" AND (url="*pdf*" OR url="*export*") AND (query="*<script>*" OR query="*javascript:*" OR query="*onerror=*" OR query="*onload=*")