CVE-2026-40305: Dnnsoftware DotNetNuke

Medium severity, CVSS 4.3. EPSS: 0.3% chance of exploitation in the next 30 days.

DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Starting in version 6.0.0 and prior to version 10.2.2, in the friends feature, a user could craft a request that would force the acceptance of a friend request on another user. Version 10.2.2 patches the issue.

Affected products

• Dnnsoftware DotNetNuke: from 6.0.0, before 10.2.2 (fixed in 10.2.2)

Published 2026-04-17. Last modified 2026-06-17.