CVE-2026-40321 | dnnsoftware Dnn.Platform up to 10.2.1 SVG File cross site scripting

VDB-358120 · CVE-2026-40321 · GCVE-0-2026-40321 DNNSOFTWARE DNN.PLATFORM UP TO 10.2.1 SVG FILE CROSS SITE SCRIPTING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.2 $0-$5k 2.44+ Summaryinfo A vulnerability classified as problematic was found in dnnsoftware Dnn.Platform up to 10.2.1. This issue affects some unknown processing of the component SVG File Handler. Executing a manipulation can lead to cross site scripting. This vulnerability is registered as CVE-2026-40321. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised. Detailsinfo A vulnerability classified as problematic was found in dnnsoftware Dnn.Platform up to 10.2.1. This vulnerability affects an unknown function of the component SVG File Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-87. The product does not neutralize or incorrectly neutralizes user-controlled input for alternate script syntax. As an impact it is known to affect integrity. CVE summarizes: DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to version 10.2.2, a user could upload a specially crafted SVG file that could include scripts that can target both authenticated and unauthenticated DNN users. The impact is increased if the scripts are run by a power user. Version 10.2.2 patches the issue. The advisory is shared for download at github.com. This vulnerability was named CVE-2026-40321 since 04/10/2026. The exploitation appears to be difficult. The attack can be initiated remotely. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007. Upgrading to version 10.2.2 eliminates this vulnerability. Productinfo Vendor dnnsoftware Name Dnn.Platform Version 10.2.0 10.2.1 Website Product: https://github.com/dnnsoftware/Dnn.Platform/ CPE 2.3info 🔒 🔒 CPE 2.2info 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.3 VulDB Meta Temp Score: 5.2 VulDB Base Score: 2.6 VulDB Temp Score: 2.5 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 8.0 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Cross site scripting CWE: CWE-87 / CWE-79 / CWE-94 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Dnn.Platform 10.2.2 Timelineinfo 04/10/2026 CVE reserved 04/17/2026 +7 days Advisory disclosed 04/17/2026 +0 days VulDB entry created 04/17/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed CVE: CVE-2026-40321 (🔒) GCVE (CVE): GCVE-0-2026-40321 GCVE (VulDB): GCVE-100-358120 Entryinfo Created: 04/17/2026 23:47 Changes: 04/17/2026 23:47 (64) Complete: 🔍 Cache ID: 99:57F:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸