CVE-2025-55620
📋 TL;DR
This cross-site scripting (XSS) vulnerability in Reolink's valuateJavascript() function allows attackers to inject and execute malicious JavaScript or HTML code. It affects Reolink users running vulnerable firmware versions, potentially compromising their camera systems and network security.
💻 Affected Systems
- Reolink camera systems
📦 What is this software?
Reolink by Reolink
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of camera system, credential theft, lateral movement to internal network, persistent backdoor installation
Likely Case
Session hijacking, credential harvesting, unauthorized camera control, privacy violation
If Mitigated
Limited to isolated camera system with no network access to critical assets
🎯 Exploit Status
Requires user interaction or access to web interface; exploit details not publicly available but vulnerability is documented
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Reolink for firmware updates newer than v4.54.0.4.20250526
Vendor Advisory: Monitor Reolink security advisories
Restart Required: Yes
Instructions:
1. Log into Reolink web interface 2. Navigate to System > Maintenance 3. Check for firmware updates 4. Download and install latest firmware 5. Reboot camera after update
🔧 Temporary Workarounds
Input Sanitization
allImplement client-side and server-side input validation for all user inputs
Content Security Policy
webImplement strict CSP headers to restrict script execution
🧯 If You Can't Patch
- Isolate camera network segment with firewall rules
- Disable remote web access and use VPN for management
🔍 How to Verify
Check if Vulnerable:
Check firmware version in Reolink web interface under System > Device InformationCheck Version:
Not applicable - check via web interfaceVerify Fix Applied:
Verify firmware version is newer than v4.54.0.4.20250526 and test input fields for XSS📡 Detection & Monitoring
Log Indicators:
- Unusual JavaScript payloads in web logs
- Multiple failed input validation attempts
- Suspicious user agent strings
Network Indicators:
- HTTP requests with script tags in parameters
- Unusual outbound connections from camera
SIEM Query:
source="reolink_web_logs" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")