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VulnerabilityPublished

CVE-2025-64095: dnnsoftware Dnn.Platform · Unrestricted File Upload

Affects dnnsoftware Dnn.PlatformSource CVE Database V5

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Not known to be exploited · public detection template (Nuclei) · 46% EPSS · CVSS 10.0 Critical : upgrade to 10.1.1 as a priority.

Data as of 5 Nov 2026, 00:01 UTC

CVSS 3.1 base score
10.0Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
46.9% chance of exploitation in 30 days – higher than 98% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 10.1.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 Oct 2025

  2. Weaponized: evidence found.

    Public exploit code: GitHub proofs of concept

  3. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  4. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Upgrade dnnsoftware/Dnn.Platform to 10.1.1.

Affected software

ProductAffectedFixed in
GitHubdnnsoftware/Dnn.Platformpkg:github/dnnsoftware/Dnn.PlatformOther threatsAffected
  • <10.1.1
Fixed in
  • 10.1.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Immediate mitigation requires upgrading all Dnn.Platform instances to version 10.1.1 or later, where the vulnerability is patched. Organizations should audit their current CMS versions and prioritize patch deployment. In addition to patching, administrators should review and harden file upload configurations by restricting allowed file types explicitly and implementing server-side validation to prevent dangerous file uploads. Employing web application firewalls (WAFs) with rules to detect and block suspicious upload attempts can provide an additional layer of defense. Monitoring file integrity on web servers can help detect unauthorized changes promptly. It is also advisable to implement strict access controls and disable or limit anonymous upload capabilities where possible. Regular security assessments and penetration testing focused on file upload functionalities should be conducted to identify residual risks. Finally, educating developers and administrators on secure coding and configuration practices related to file handling will reduce future vulnerabilities.

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.

References

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