CVE-2025-59547

DNN's CKEditor File Uploader functionality vulnerable through Unicode obfuscation

State: Published
Severity: 5.3 Medium
Published: Sep 23, 2025
Updated: Sep 23, 2025
Reserved: Sep 17, 2025

Description

DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to version 10.1.0, the CKEditor file upload endpoint has insufficient sanitization for filenames allowing probing network endpoints. A specially crafted request can be made to upload a file with Unicode characters, which would be translated into a path that could expose resources in the internal network of the hosted site. This issue has been patched in version 10.1.0.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	GitHub_M

Weaknesses

CWE-176 Improper Handling of Unicode Encoding

Affected Products

Product	Versions
Dnn.Platformdnnsoftware	< 10.1.0Affected

References

https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-cgqj-mw4m-v7hp

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