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Dotnetnuke CVE-2025-59547

MEDIUM
Improper Handling of Unicode Encoding (CWE-176)
2025-09-23 security-advisories@github.com
5.3
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Unicode normalization
Impact

CVSS score of 5.3 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 0.07%.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 28, 2026

DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-176. 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. Affected products include: Dnnsoftware Dotnetnuke. Version information: version 10.1.0.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

DescriptionNVD

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.

Executive ViewAI

Why It Matters

Organizations using the Microsoft ecosystem. should be aware of moderate risk from CVE-2025-59547 rated CVSS 5.3. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score
0.1%
Top 80% exploitable
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.1%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
Low

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Malicious file upload attacks exploit insufficient validation when web applications accept user-provided files.

Affected Products (CPE)NVD

cpe:2.3:a:dnnsoftware:dotnetnuke:*:*:*:*:*:*:*:*
CVE-2017-9822 HIGH POC
8.8 Jul 20

DNN (aka DotNetNuke) before 9.1.1 has Remote Code Execution via a cookie, aka "2017-08 (Critical) Possible remote code e

CVE-2015-2794 CRITICAL POC
9.8 Feb 06

The installation wizard in DotNetNuke (DNN) before 7.4.1 allows remote attackers to reinstall the application and gain S

CVE-2025-64095 CRITICAL POC
9.8 Oct 28

Unauthenticated attackers can upload and overwrite files in DNN Platform before 10.1.1 through the default HTML editor p

CVE-2025-52488 HIGH POC
8.6 Jun 21

DNN (DotNetNuke) CMS versions 6.0.0 through 10.0.0 contain a vulnerability that can expose NTLM hashes to a third-party

CVE-2020-5187 HIGH POC
8.8 Feb 24

DNN (formerly DotNetNuke) through 9.4.4 allows Path Traversal (issue 2 of 2). Rated high severity (CVSS 8.8), this vulne

CVE-2020-5188 MEDIUM POC
6.5 Feb 24

DNN (formerly DotNetNuke) through 9.4.4 has Insecure Permissions. Rated medium severity (CVSS 6.5), this vulnerability i

CVE-2020-37103 MEDIUM POC
6.4 Feb 03

DotNetNuke 9.5 contains a persistent cross-site scripting vulnerability that allows normal users to upload malicious XML

CVE-2019-12562 MEDIUM POC
6.1 Sep 26

Stored Cross-Site Scripting in DotNetNuke (DNN) Version before 9.4.0 allows remote attackers to store and embed the mali

CVE-2020-5186 MEDIUM POC
5.4 Feb 24

DNN (formerly DotNetNuke) through 9.4.4 allows XSS (issue 1 of 2). Rated medium severity (CVSS 5.4), this vulnerability

CVE-2026-24838 CRITICAL
9.1 Jan 28

DNN (DotNetNuke) CMS has a stored XSS vulnerability (CVSS 9.1) allowing persistent script injection that executes for al

CVE-2025-59545 CRITICAL
9.0 Sep 23

DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Rated crit

CVE-2022-2922 MEDIUM POC
4.9 Sep 30

Relative Path Traversal in GitHub repository dnnsoftware/dnn.platform prior to 9.11.0. Rated medium severity (CVSS 4.9),

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