CVE-2025-40890
📋 TL;DR
A stored XSS vulnerability in Dashboards functionality allows authenticated low-privilege users to inject malicious JavaScript into dashboards. When victims view or import these dashboards, the attacker can execute actions as the victim, potentially modifying data or accessing sensitive information. This affects users of the vulnerable software with dashboard functionality.
💻 Affected Systems
- Software with Dashboards functionality
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains full administrative privileges through victim's session, leading to complete system compromise, data exfiltration, or service disruption.
Likely Case
Attacker performs limited unauthorized actions as victim users, such as modifying dashboard content, accessing user-specific data, or disrupting individual user experiences.
If Mitigated
With proper input validation and output encoding, the vulnerability is prevented, though dashboard sharing functionality may still be abused for social engineering.
🎯 Exploit Status
Exploitation requires authenticated access but is technically simple once access is obtained. Social engineering can facilitate victim interaction.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://security.nozominetworks.com/NN-2025:11-01
Restart Required: No
Instructions:
1. Monitor vendor for patch release. 2. Apply patch when available. 3. Test in non-production environment first. 4. Deploy to production.
🔧 Temporary Workarounds
Disable dashboard sharing
allPrevent users from sharing dashboards to block the primary attack vector
Implement Content Security Policy
allAdd CSP headers to restrict script execution from untrusted sources
Content-Security-Policy: default-src 'self'; script-src 'self'
🧯 If You Can't Patch
- Implement strict input validation and output encoding for all dashboard parameters
- Restrict dashboard import functionality to trusted administrators only
🔍 How to Verify
Check if Vulnerable:
Test dashboard functionality by attempting to inject JavaScript payloads into dashboard parameters and observing if they executeCheck Version:
Check application version through admin interface or configuration filesVerify Fix Applied:
After applying fix, attempt same XSS payloads and verify they are properly sanitized or blocked📡 Detection & Monitoring
Log Indicators:
- Unusual dashboard creation/modification patterns
- JavaScript payloads in dashboard parameter logs
- Multiple dashboard imports from single user
Network Indicators:
- Unexpected JavaScript execution in dashboard responses
- Suspicious dashboard sharing activity
SIEM Query:
source="application_logs" AND (dashboard_created OR dashboard_modified) AND (javascript OR script OR eval)