Medium severity · published Sep 23, 2025
CVE-2025-59821
DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem
6.1
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DO
Dotnetnuke · Dnnsoftware
before 10.1.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-59821
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-59821
Vendor Advisory
https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-jc4g-c8ww-5738
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