What’s Vulnerable › Vulnerabilities
CVE-2025-59547: DNN's CKEditor File Uploader functionality vulnerable through Unicode obfuscation
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-09-23 · updated 2026-10-11
- Weakness: CWE-176
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.
Affected products
- DotNetNuke CMS Fixed in 9.1.1: before 10.1.0 — fixed in 10.1.0
How to fix
Upgrade to a fixed version: DotNetNuke CMS Fixed in 9.1.1 10.1.0. Check the vendor advisory for mitigations.
References
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