CVE-2025-59821: DNN vulnerable to Reflected Cross-Site Scripting (XSS) using url to profile
Summary A reflected cross-site scripting (XSS) vulnerability exists under certain conditions, using a specially crafter url to view a user profile
Description DNN’s URL/path handling and template rendering can allow specially crafted input to be reflected into a user profile that are returned to the browser. In these cases, the application does not sufficiently neutralize or encode characters that are meaningful in HTML, so an attacker can cause a victim’s browser to interpret attacker-controlled content as part of the page’s HTML.
Other sources
DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to version 10.1.0, DNN’s URL/path handling and template rendering can allow specially crafted input to be reflected into a user profile that is returned to the browser. In these cases, the application does not sufficiently neutralize or encode characters that are meaningful in HTML, so an attacker can cause a victim’s browser to interpret attacker-controlled content as part of the page’s HTML. This issue has been patched in version 10.1.0.
— MITRE
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-59821?
CVE-2025-59821 is considered a high severity reflected cross-site scripting (XSS) vulnerability.
How do I fix CVE-2025-59821?
To mitigate CVE-2025-59821, update the DotNetNuke.Core package to a version above 10.1.0.
What causes CVE-2025-59821?
CVE-2025-59821 is caused by improper handling of user input in DNN's URL/path processing and template rendering.
Which software versions are affected by CVE-2025-59821?
CVE-2025-59821 affects versions of DotNetNuke.Core up to 10.1.0.
What are the potential impacts of CVE-2025-59821?
Exploitation of CVE-2025-59821 could allow attackers to execute arbitrary JavaScript in the context of a user’s browser.