CVE-2025-26394
📋 TL;DR
SolarWinds Observability Self-Hosted has an open redirection vulnerability where attackers can manipulate URLs to redirect authenticated users to malicious sites. This affects organizations running vulnerable versions of SolarWinds Observability Self-Hosted. Attackers need authentication and high complexity to exploit this vulnerability.
💻 Affected Systems
- SolarWinds Observability Self-Hosted
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Authenticated users could be redirected to phishing sites that steal credentials or deliver malware, potentially leading to account compromise or system infection.
Likely Case
Limited impact due to authentication requirement and high complexity; attackers might use it for phishing campaigns against authenticated users.
If Mitigated
Minimal impact with proper authentication controls and user awareness about suspicious redirects.
🎯 Exploit Status
Exploitation requires authenticated access and specific URL manipulation techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2025.2 or later
Vendor Advisory: https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-26394
Restart Required: Yes
Instructions:
1. Download SolarWinds Observability Self-Hosted version 2025.2 or later from SolarWinds customer portal. 2. Follow SolarWinds upgrade documentation for your deployment type. 3. Apply the update and restart services as required.
🔧 Temporary Workarounds
Input validation enhancement
allImplement additional URL validation at web application firewall or proxy level
User awareness training
allTrain users to recognize suspicious redirects and report them
🧯 If You Can't Patch
- Restrict access to SolarWinds Observability to trusted networks only
- Implement strict URL validation at network perimeter devices
🔍 How to Verify
Check if Vulnerable:
Check SolarWinds Observability version in web interface or via SolarWinds APICheck Version:
Check web interface or refer to SolarWinds documentation for version checking commandsVerify Fix Applied:
Verify version is 2025.2 or later and test URL redirection functionality📡 Detection & Monitoring
Log Indicators:
- Unusual redirect patterns in web server logs
- Multiple failed authentication attempts followed by redirects
Network Indicators:
- Unexpected outbound connections following SolarWinds access
- Suspicious URL parameters in HTTP requests
SIEM Query:
source="solarwinds" AND (url="*redirect*" OR url="*url=*" OR url="*http://*" OR url="*https://*")