CVE-2025-61949
📋 TL;DR
LogStare Collector has a stored XSS vulnerability in its UserManagement feature where malicious user information can execute arbitrary scripts in victims' browsers when they access the management page. This affects all users with access to the management interface of vulnerable LogStare Collector installations.
💻 Affected Systems
- LogStare Collector
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, perform actions as authenticated users, or deploy malware to management console users.
Likely Case
Session hijacking, credential theft, or unauthorized actions performed through the management interface.
If Mitigated
Limited to script execution in management console context with proper input validation bypassed.
🎯 Exploit Status
Requires ability to create/modify user accounts in UserManagement, but exploitation is straightforward once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.2.1
Vendor Advisory: https://www.logstare.com/vulnerability/2025-001/
Restart Required: Yes
Instructions:
1. Download LogStare Collector 3.2.1 from official vendor site. 2. Backup current configuration. 3. Stop LogStare Collector service. 4. Install/upgrade to version 3.2.1. 5. Restart LogStare Collector service. 6. Verify version and functionality.
🔧 Temporary Workarounds
Input Validation Filter
allImplement web application firewall or input validation to sanitize user management inputs
Content Security Policy
allImplement strict CSP headers to prevent script execution from untrusted sources
Add 'Content-Security-Policy: default-src 'self'; script-src 'self'' to web server headers
🧯 If You Can't Patch
- Restrict access to UserManagement functions to trusted administrators only
- Implement monitoring for unusual user account modifications or script-like content in user fields
🔍 How to Verify
Check if Vulnerable:
Check LogStare Collector version; if below 3.2.1, system is vulnerable. Review user management entries for script tags or malicious content.Check Version:
logstare-collector --versionVerify Fix Applied:
After patching, verify version is 3.2.1 or higher and test user management functionality with script-like inputs to confirm sanitization.📡 Detection & Monitoring
Log Indicators:
- Unusual user account modifications
- Script tags or JavaScript in user field entries
- Multiple failed login attempts from management console
Network Indicators:
- Unexpected outbound connections from management console browsers
- Suspicious payloads in HTTP POST to user management endpoints
SIEM Query:
source="logstare" AND (event_type="user_modified" AND (user_data CONTAINS "<script>" OR user_data CONTAINS "javascript:"))