CVE-2025-63354
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in Hitron HI3120 routers allows attackers to inject malicious JavaScript via the Parental Control filter creation interface. When exploited, this enables session hijacking, credential theft, or device compromise for users accessing the router's web interface. All users of affected Hitron HI3120 routers with the vulnerable firmware are at risk.
💻 Affected Systems
- Hitron HI3120
📦 What is this software?
Hi3120 Firmware by Hitrontech
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise allowing attacker to change DNS settings, intercept all network traffic, install persistent malware, or brick the device.
Likely Case
Session hijacking of router admin panel leading to network configuration changes, credential theft, or redirection to malicious sites.
If Mitigated
Limited impact if router is behind firewall with restricted web interface access and users don't access admin panel.
🎯 Exploit Status
Exploit requires authentication to router admin interface; stored XSS payload persists until cleared.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
No official patch available. Monitor Hitron security advisories for firmware updates addressing CVE-2025-63354.
🔧 Temporary Workarounds
Disable Parental Control Feature
allTurn off Parental Control functionality to prevent exploitation via this attack vector.
Access router web interface > Parental Control > Disable
Restrict Web Interface Access
allConfigure firewall rules to limit access to router admin interface to trusted IPs only.
🧯 If You Can't Patch
- Isolate router on separate VLAN with no access to critical internal resources
- Implement strict input validation at network perimeter for router management traffic
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface: Status > Device Info > Firmware VersionCheck Version:
curl -s http://router-ip/cgi-bin/status | grep FirmwareVerify Fix Applied:
Test XSS payload injection in Parental Control filter creation; successful sanitization indicates fix.📡 Detection & Monitoring
Log Indicators:
- Unusual JavaScript strings in Parental Control filter names
- Multiple failed login attempts followed by filter creation
Network Indicators:
- HTTP POST requests to /cgi-bin/parental with JavaScript payloads
- Unusual outbound connections from router after admin login
SIEM Query:
source="router.log" AND ("parental" AND ("script" OR "javascript" OR "onerror"))