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CVE-2025-32371— Unexpected external content may be displayed in DNN ImageHandler

Quick assessment

Affected
dnnsoftware Dnn.Platform
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

DNN（又名DotNetNuke）是美国DNN公司的一套由微软支持、基于ASP.NET平台的开源内容管理系统（CMS）。该系统具有易于安装、可扩展、功能丰富等特点。 DNN存在安全漏洞，该漏洞源于可特制URL在DNN ImageHandler中渲染文本。

CVSS 4.3 · Medium EPSS 0.29% · P20

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2025-32371

Vulnerability Information
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Vulnerability Title
Unexpected external content may be displayed in DNN ImageHandler
Source: CVE Program / CVE List V5
Vulnerability Description
DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. A url could be crafted to the DNN ImageHandler to render text from a querystring parameter. This text would display in the resulting image and a user that trusts the domain might think that the information is legitimate. This vulnerability is fixed in 9.13.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键信息的UI错误表达
Source: CVE Program / CVE List V5
Vulnerability Title
DNN 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
DNN（又名DotNetNuke）是美国DNN公司的一套由微软支持、基于ASP.NET平台的开源内容管理系统（CMS）。该系统具有易于安装、可扩展、功能丰富等特点。 DNN存在安全漏洞，该漏洞源于可特制URL在DNN ImageHandler中渲染文本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
dnnsoftware Dnn.Platform < 9.13.4 -

II. Public POCs for CVE-2025-32371

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III. Intelligence Information for CVE-2025-32371

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Same Patch Batch · dnnsoftware · 2025-04-09 · 4 CVEs total

CVE-2025-32372 6.5 MEDIUM Server-Side Request Forgery (SSRF) in DotNetNuke.Core
CVE-2025-32373 6.5 MEDIUM DNN allows a registered user to enumerate and access files they should not have access to
CVE-2025-32374 5.9 MEDIUM Possible Denial of Service (DoS) in DNN.PLATFORM registration

IV. Related Vulnerabilities

Same product: Dnn.Platform
Same vendor: dnnsoftware
Same weakness: CWE-451

V. Comments for CVE-2025-32371

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