CVE-2024-34089
📋 TL;DR
A stored cross-site scripting (XSS) vulnerability in Archer Platform 6 allows authenticated attackers to inject malicious scripts into application data stores. When other users access the compromised data, their browsers execute the attacker's code within the vulnerable application context. This affects Archer Platform 6 installations before version 2024.04.
💻 Affected Systems
- Archer Platform
📦 What is this software?
Archer by Archerirm
Archer by Archerirm
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as victims, redirect to malicious sites, or compromise user accounts and data integrity.
Likely Case
Attackers with authenticated access could steal session tokens or credentials from other users, potentially leading to account takeover.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before execution.
🎯 Exploit Status
Exploitation requires authenticated access and knowledge of vulnerable endpoints
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2024.04 or 6.14.0.3
Vendor Advisory: https://www.archerirm.community/t5/platform-announcements/archer-update-for-multiple-vulnerabilities/ta-p/720963
Restart Required: Yes
Instructions:
1. Download Archer Platform 2024.04 or 6.14.0.3 from official sources. 2. Backup current installation and data. 3. Apply the update following Archer's upgrade documentation. 4. Restart Archer services. 5. Verify successful update.
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement additional input validation and output encoding for user-supplied data in Archer custom applications
Content Security Policy
allImplement strict Content Security Policy headers to restrict script execution
🧯 If You Can't Patch
- Restrict user permissions to minimize attack surface
- Implement web application firewall rules to detect and block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check Archer Platform version via Archer Control Panel or version files in installation directoryCheck Version:
Check Archer Control Panel > About or examine version.txt in installation directoryVerify Fix Applied:
Verify version is 2024.04 or 6.14.0.3 and test XSS payloads in previously vulnerable fields📡 Detection & Monitoring
Log Indicators:
- Unusual HTML/JavaScript patterns in user input logs
- Multiple failed XSS attempts
Network Indicators:
- Suspicious script tags in HTTP POST requests to Archer endpoints
SIEM Query:
source="archer" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")