CVE-2025-64095 — DNN.PLATFORM
CRITICALCVE-2025-64095 is a critical-severity (CVSS 10) Unrestricted File Upload vulnerability in DNN.PLATFORM. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for DNN.PLATFORM — see the affected versions and patch details below.
DNN Insufficient Access Control - Image Upload allows for Site Content Overwrite
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2025-64095.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
DNN.PLATFORMReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.
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.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| .NETNuGet | DNN.PLATFORM | all versions | 10.1.1dotnet add package DNN.PLATFORM --version 10.1.1 |
Affected Products
dotnetnukednnsoftwareResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for DNN.PLATFORM, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update DNN.PLATFORM to 10.1.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-64095 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.
How to detect CVE-2025-64095
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id cve-2025-64095 -u https://target- Template
- DNN - Unrestricted Arbitrary File Upload
- Severity
- critical
- Impact
- Unauthenticated attackers can upload and overwrite files, leading to website defacement and cross-site scripting attacks.
- Remediation
- Update to version 10.1.1 or later.
Template by ProjectDiscovery nuclei-templates (DhiyaneshDk, pussycat0x), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is CVE-2025-64095 in your dependencies?
Find it across NuGet, including transitive dependencies.