DNN Insufficient Access Control - Image Upload allows for Site Content Overwrite
Summary
The default HTML editor provider allows unauthenticated file uploads and images can overwrite existing files.
Description
An unauthenticated user can upload and replace existing files allowing defacing a website and combined with other issue, injection XSS payloads.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | DNN.PLATFORM | < 10.1.1 | 10.1.1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H- Weakness (CWE)
CWE-434- Platform
- .NET (NuGet)
- Package
DNN.PLATFORM- Disclosed
- 29.10.2025
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-3m8r-w7xg-jqvw - CC BY 4.0
Vulnerability history: DNN.PLATFORM
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 6
- First → latest
- 06.2025 10.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 2
- Medium 3
Disclosures per year
- 2025: 6
- 2026: 0
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DNN Insufficient Access Control - Image Upload allows for Site Content Overwrite this entry
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