# CVE-2025-64095: Dnn.Platform - XSS

> Live exploitation tracking for CVE-2025-64095 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2025-64095

## Key facts

- **Exploitation phase:** Limited Exploitation. The vulnerability is known but shows very limited attacker interest or exploitation activity.
- **CVSS score:** 10.0
- **Public exploit available:** Yes
- **Affected products:** DNNsoftware Dnn.Platform
- **Weaknesses:** CWE-434 (Unrestricted Upload of File with Dangerous Type)
- **Tags:** cms

## 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.

## CrowdSec analysis

[CVE-2025-64095](https://euvd.enisa.europa.eu/vulnerability/CVE-2025-64095) is a critical vulnerability in DNN (DotNetNuke) prior to version 10.1.1 that allows unauthenticated users to upload files and overwrite existing content via the default HTML editor provider. This flaw can be exploited to deface websites or inject malicious XSS payloads, potentially leading to full site compromise and further attacks.

CrowdSec has been tracking this vulnerability and its exploits since 26th of November 2025.

Insights from the CrowdSec network reveal that the attackers trying to exploit CVE-2025-64095 are composed of a fairly even mix of opportunistic and targeted actors. Some attackers employ preliminary reconnaissance, while others use indiscriminate scanning.
In addition, according to the CrowdSec network, attack volume against CVE-2025-64095 has dipped slightly compared to the previous week. Although still commonly targeted, the decline suggests a cooling-off period. Long-term relevance remains, but attention is waning.

Attackers exploit the unrestricted file upload vulnerability by sending crafted POST requests to `/Providers/HtmlEditorProviders/DNNConnect.CKE/Browser/FileUploader.ashx`, allowing them to upload arbitrary files without authentication. This endpoint is targeted to overwrite or add files, enabling website defacement and potential XSS payload injection.

## Timeline

- 2025-10-28: CVE Published. CVE-2025-64095 is published to NVD.
- 2025-11-26: Rule Released. CrowdSec releases a rule to detect CVE-2025-64095 exploitation attempts against the CrowdSec Network.
- 2025-11-27: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2025-64095 for the first time.

## 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

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2025-64095) follows observed exploitation activity for CVE-2025-64095. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.