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Improper Handling of Unicode Encoding

CVE-2025-59547

Medium
5.3/10

Summary

DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Versions prior to 10.1.0-rc1, 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.

  • LOW
  • NETWORK
  • NONE
  • UNCHANGED
  • NONE
  • NONE
  • LOW
  • NONE

CWE-176 - Improper Handling of Unicode Encoding

The software does not properly handle when an input contains Unicode encoding.

References

Advisory Timeline

  • Published