CVE-2025-64095
DNN Insufficient Access Control - Image Upload allows for Site Content Overwrite
DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to 10.1.1, the default HTML editor provider allows unauthenticated file uploads and images can overwrite existing files. An unauthenticated user can upload and replace existing files allowing defacing a website and combined with other issue, injection XSS payloads. This vulnerability is fixed in 10.1.1.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
DNN Insufficient Access Control - Image Upload allows for Site Content Overwrite
DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to 10.1.1, the default HTML editor provider allows unauthenticated file uploads and images can overwrite existing files. An unauthenticated user can upload and replace existing files allowing defacing a website and combined with other issue, injection XSS payloads. This vulnerability is fixed in 10.1.1.
- Record
CVE-2025-64095- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-434
- Updated
- 2026-11-02
EUVDEUVD-2025-36564
DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to 10.1.1, the default HTML editor provider allows unauthenticated file uploads and images can overwrite existing files. An unauthenticated user can upload and replace existing files allowing defacing a website and combined with other issue, injection XSS payloads. This vulnerability is fixed in 10.1.1.
- Record
EUVD-2025-36564- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-3m8r-w7xg-jqvw
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.
- Record
GHSA-3m8r-w7xg-jqvw- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-434
- Updated
- 2026-11-02
NVD
DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to 10.1.1, the default HTML editor provider allows unauthenticated file uploads and images can overwrite existing files. An unauthenticated user can upload and replace existing files allowing defacing a website and combined with other issue, injection XSS payloads. This vulnerability is fixed in 10.1.1.
- Record
CVE-2025-64095- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-434
- Updated
- 2026-11-02
OSV
DNN Insufficient Access Control - Image Upload allows for Site Content Overwrite
DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to 10.1.1, the default HTML editor provider allows unauthenticated file uploads and images can overwrite existing files. An unauthenticated user can upload and replace existing files allowing defacing a website and combined with other issue, injection XSS payloads. This vulnerability is fixed in 10.1.1.
- Record
CVE-2025-64095- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-434
- Updated
- 2026-11-02
OSVGHSA-3m8r-w7xg-jqvw
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.
- Record
GHSA-3m8r-w7xg-jqvw- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Weakness
- CWE-434
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
DNN.PLATFORMNuGet |
before 10.1.1 | 10.1.1 |
DNN.PLATFORMNuGet |
before 10.1.1, plus listed versions 7.2.07.3.07.4.08.0.09.1.09.2.09.4.09.9.0 |
10.1.1 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Nuclei | DNN - Unrestricted Arbitrary File Upload | |
| PoC in GitHub | 0xr2r/CVE-2025-64095 | 2025-11-18 |
| PoC in GitHub | h4x0r-dz/CVE-2025-64095---DNN-Unauthenticated-arbitrary-file-upload | 2025-10-31 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, Nuclei, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-64095 is a critical vulnerability (CVSS 10.0) in Dnnsoftware Dotnetnuke, published October 28, 2025. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 47.0%, the 98th percentile. Fixed in DNN.PLATFORM 10.1.1.