Arbitrary file upload in Dnnsoftware Dnn.platform

CVE-2025-64095

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.

Vulnerability class: Unrestricted File Upload

Published · last modified .

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.470 (98.8th percentile), scored .

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-64095: rose from 0.447 to 0.470.

EPSS over last 30 days · oldest: 0.447 · newest: 0.470 · change: +0.023

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-64095?
CVE-2025-64095 is a critical-severity vulnerability in Dnnsoftware Dnn.platform, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 10.0/10. Published 2025-10-28.
How severe is CVE-2025-64095?
Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2025-64095 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.