CVE-2025-69848
📋 TL;DR
A reflected cross-site scripting (XSS) vulnerability in NetBox allows attackers to inject malicious scripts into error messages when delete operations fail. This affects NetBox versions 2.11.0 through 3.7.x, potentially enabling execution of arbitrary JavaScript in the context of authenticated users, including administrators.
💻 Affected Systems
- NetBox
📦 What is this software?
Netbox by Netbox
⚠️ Risk & Real-World Impact
Worst Case
Privileged user executes malicious JavaScript leading to session hijacking, account takeover, or administrative actions performed by the attacker.
Likely Case
Attacker steals session cookies or authentication tokens from authenticated users, gaining unauthorized access to the NetBox instance.
If Mitigated
Attack fails due to proper input validation, output encoding, or Content Security Policy (CSP) blocking script execution.
🎯 Exploit Status
Exploitation requires tricking an authenticated user into clicking a malicious link that triggers a delete operation failure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.7.2 or later
Vendor Advisory: https://github.com/netbox-community/netbox/releases
Restart Required: Yes
Instructions:
1. Backup your NetBox database and configuration. 2. Update NetBox to version 3.7.2 or later using pip: 'pip install --upgrade netbox'. 3. Run database migrations: 'python manage.py migrate'. 4. Restart the NetBox service.
🔧 Temporary Workarounds
Implement Content Security Policy
allAdd a strict CSP header to block inline scripts and restrict script sources.
Add 'Content-Security-Policy: script-src 'self';' to web server configuration
Input Validation Filter
linuxAdd middleware to sanitize object names in delete request parameters.
Implement custom Django middleware to escape HTML special characters in relevant parameters
🧯 If You Can't Patch
- Restrict delete permissions to trusted users only
- Implement web application firewall (WAF) rules to block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check NetBox version with: 'python -c "import netbox; print(netbox.__version__)"'Check Version:
python -c "import netbox; print(netbox.__version__)"Verify Fix Applied:
Confirm version is 3.7.2 or later and test delete operations with malicious object names.📡 Detection & Monitoring
Log Indicators:
- Unusual delete operation failures with special characters in object names
- Multiple failed delete requests from single IP
Network Indicators:
- HTTP requests with script tags or JavaScript in delete parameters
SIEM Query:
source="netbox.log" AND "DELETE" AND ("<script>" OR "javascript:")