CVE-2025-64095

DNN Insufficient Access Control - Image Upload allows for Site Content Overwrite

State: Published
Severity: 10.0 Critical
Published: Oct 28, 2025
Updated: Oct 29, 2025
Reserved: Oct 27, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	10.0 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-434 Unrestricted Upload of File with Dangerous Type

Affected Products

Product	Versions
Dnn.Platformdnnsoftware	< 10.1.1Affected

References

https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-3m8r-w7xg-jqvw

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