CVE-2026-1008
📋 TL;DR
A stored XSS vulnerability in Altium 365 user profile fields allows authenticated attackers to inject malicious scripts that execute when other users view the profile. This can lead to session hijacking, phishing, or unauthorized actions. All Altium 365 users who view affected profiles are potentially impacted.
💻 Affected Systems
- Altium 365
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator session tokens, gain full system access, deploy ransomware, or compromise the entire Altium 365 instance and connected systems.
Likely Case
Attackers steal user credentials, perform phishing attacks within the platform, redirect users to malicious sites, or deface profiles.
If Mitigated
With proper input validation and output encoding, the payloads are neutralized, preventing script execution while maintaining profile functionality.
🎯 Exploit Status
Exploitation requires authenticated access and user interaction (viewing the profile), but the XSS injection itself is straightforward using whitespace bypass techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Altium security advisory for specific version
Vendor Advisory: https://www.altium.com/platform/security-compliance/security-advisories
Restart Required: No
Instructions:
1. Review the Altium security advisory. 2. Apply the latest Altium 365 update. 3. Verify the fix by testing XSS payloads in profile fields.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input sanitization to strip or encode HTML/JavaScript in user profile fields.
Content Security Policy (CSP)
allDeploy a strict CSP header to block inline scripts and restrict script sources.
Content-Security-Policy: default-src 'self'; script-src 'self'
🧯 If You Can't Patch
- Implement a web application firewall (WAF) with XSS protection rules to block malicious payloads.
- Disable or restrict user profile editing functionality until patching is possible.
🔍 How to Verify
Check if Vulnerable:
Test by injecting a simple XSS payload like <script>alert('XSS')</script> into user profile fields and check if it executes when viewing the profile.Check Version:
Check the Altium 365 interface or admin panel for current version information.Verify Fix Applied:
After patching, attempt the same XSS injection; the payload should be sanitized and not execute.📡 Detection & Monitoring
Log Indicators:
- Unusual HTML or script patterns in user profile update logs
- Multiple profile views from single IPs
Network Indicators:
- HTTP requests containing suspicious script tags or encoded payloads in profile data
SIEM Query:
source="altium_logs" AND (message="*<script>*" OR message="*javascript:*")