CVE-2025-32373
📋 TL;DR
CVE-2025-32373 is an authorization bypass vulnerability in DNN CMS where registered users can craft requests to enumerate or access portal files they shouldn't have permission to view. This affects DNN installations with specific configurations that allow user registration and file access. The vulnerability could lead to unauthorized information disclosure.
💻 Affected Systems
- DNN Platform (formerly DotNetNuke)
📦 What is this software?
Dotnetnuke by Dnnsoftware
⚠️ Risk & Real-World Impact
Worst Case
Registered users could access sensitive portal files containing configuration data, user information, or other confidential content, potentially leading to further attacks or data breaches.
Likely Case
Registered users discover and access files they shouldn't have permission to view, leading to unauthorized information disclosure of portal content or configuration details.
If Mitigated
With proper access controls and monitoring, impact is limited to low-value file access that is quickly detected and contained.
🎯 Exploit Status
Requires registered user account. Exploitation involves crafting specific HTTP requests to bypass authorization checks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.13.8
Vendor Advisory: https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-vxcm-4rwh-chpc
Restart Required: Yes
Instructions:
1. Backup your DNN installation and database. 2. Download DNN Platform version 9.13.8 or later. 3. Follow the DNN upgrade documentation to apply the update. 4. Restart the application pool or IIS. 5. Verify the update was successful.
🔧 Temporary Workarounds
Disable User Registration
allTemporarily disable new user registration to prevent unauthorized users from exploiting this vulnerability.
Navigate to Site Settings > Security > Registration Settings and disable user registration
Restrict File Access
allReview and tighten file permissions on portal directories to limit access to authorized users only.
Review file permissions in Portal Settings > Security > File Permissions
🧯 If You Can't Patch
- Implement strict access controls and monitor for unusual file access patterns by registered users.
- Disable user registration and review existing user accounts for suspicious activity.
🔍 How to Verify
Check if Vulnerable:
Check DNN version in Host Settings > Host Information. If version is below 9.13.8 and user registration is enabled, the system may be vulnerable.Check Version:
Check version in DNN admin panel under Host Settings > Host InformationVerify Fix Applied:
Verify DNN version is 9.13.8 or higher in Host Settings > Host Information. Test with registered user account attempting to access unauthorized portal files.📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns by registered users
- Multiple failed authorization attempts followed by successful file access
- Requests to portal files from registered users outside normal patterns
Network Indicators:
- HTTP requests to portal files with crafted parameters
- Unusual file enumeration patterns from authenticated sessions
SIEM Query:
source="dnn_logs" AND (event_type="file_access" AND user_role="registered" AND file_path CONTAINS "/portals/")