CVE-2025-27216
📋 TL;DR
This vulnerability in the UISP application allows authenticated users with certain permissions to escalate their privileges to higher levels. It affects organizations using Ubiquiti's UISP network management software. Attackers could gain administrative control over the network management system.
💻 Affected Systems
- Ubiquiti UISP (UniFi Network Server)
⚠️ 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
Full administrative control of the UISP system, allowing complete network compromise, data exfiltration, and lateral movement to managed devices.
Likely Case
Privileged user gains administrative access to UISP, enabling unauthorized configuration changes, user account manipulation, and potential access to managed network devices.
If Mitigated
Limited impact with proper network segmentation, minimal user permissions, and monitoring in place to detect privilege escalation attempts.
🎯 Exploit Status
Requires authenticated access to UISP with any user permissions. The vulnerability is in permission validation logic.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: UISP 2.5.0 and later
Vendor Advisory: https://community.ui.com/releases/Security-Advisory-Bulletin-053/b0c4aa38-90aa-412d-b5b9-6395e057d822
Restart Required: Yes
Instructions:
1. Backup current UISP configuration. 2. Download UISP 2.5.0 or later from Ubiquiti website. 3. Stop UISP service. 4. Install/upgrade to patched version. 5. Restart UISP service. 6. Verify version and functionality.
🔧 Temporary Workarounds
Minimize User Permissions
allReduce attack surface by granting users only the minimum necessary permissions
Network Segmentation
allIsolate UISP management interface from general user networks
🧯 If You Can't Patch
- Implement strict access controls and monitor all UISP user activity for privilege escalation attempts
- Segment UISP management network and restrict access to only necessary administrative personnel
🔍 How to Verify
Check if Vulnerable:
Check UISP version in web interface under Settings > System > About. If version is below 2.5.0, system is vulnerable.Check Version:
On Linux: cat /usr/lib/uisp/version.txt or check web interface. On Windows: Check installed programs list or web interface.Verify Fix Applied:
After patching, verify version shows 2.5.0 or higher in Settings > System > About. Test user permission boundaries to ensure privilege escalation is prevented.📡 Detection & Monitoring
Log Indicators:
- Unexpected permission changes in audit logs
- User accounts gaining administrative privileges unexpectedly
- Failed permission validation attempts
Network Indicators:
- Unusual API calls to permission-related endpoints from non-admin users
- Multiple permission modification requests from single user
SIEM Query:
source="uisp" AND (event_type="permission_change" OR event_type="user_escalation") AND user_role!="admin"