Medium severity · published Sep 23, 2025
CVE-2025-59547
DNN's CKEditor File Uploader functionality vulnerable through Unicode obfuscation
5.3
CVSS
0.3%
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, the CKEditor file upload endpoint has insufficient sanitization for filenames allowing probing network endpoints. A specially crafted request can be made to upload a file with Unicode characters, which would be translated into a path that could expose resources in the internal network of the hosted site. This issue has been patched in version 10.1.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 18% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DN
Dnn.Platform · dnnsoftware
< 10.1.0 · source: vendor
DO
Dotnetnuke · Dnnsoftware
before 10.1.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-59547
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-59547
Vendor Advisory
https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-cgqj-mw4m-v7hp
More from Dnn.Platform
9.8
CVE-2025-64095
DNN Insufficient Access Control - Image Upload allows for Site Content Overwrite
9.0
CVE-2025-59545
DNN Vulnerable to Stored Cross-Site Scripting (XSS) in the Prompt module
8.6
CVE-2025-52488
DNN.PLATFORM leaks NTLM hash via SMB Share Interaction with malicious user input
8.0
CVE-2026-40321
DotNetNuke.Core has stored cross-site-scripting (XSS) via SVG upload
7.5
CVE-2025-52487
DNN.PLATFORM possibly allows bypass of IP Filters