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Vulnerability details: VCID-7u59-m3nn-q3gj
Vulnerability ID VCID-7u59-m3nn-q3gj
Aliases CVE-2026-40321
GHSA-ffq7-898w-9jc4
Summary DotNetNuke.Core has stored cross-site-scripting (XSS) via SVG upload 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.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-87 Improper Neutralization of Alternate XSS Syntax
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00021 https://api.first.org/data/v1/epss?cve=CVE-2026-40321
epss 0.00021 https://api.first.org/data/v1/epss?cve=CVE-2026-40321
epss 0.00021 https://api.first.org/data/v1/epss?cve=CVE-2026-40321
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-ffq7-898w-9jc4
cvssv3.1 8.0 https://github.com/dnnsoftware/Dnn.Platform
generic_textual HIGH https://github.com/dnnsoftware/Dnn.Platform
cvssv3.1 8.0 https://github.com/dnnsoftware/Dnn.Platform/releases/tag/v10.2.2
cvssv3.1 8.1 https://github.com/dnnsoftware/Dnn.Platform/releases/tag/v10.2.2
generic_textual HIGH https://github.com/dnnsoftware/Dnn.Platform/releases/tag/v10.2.2
ssvc Track https://github.com/dnnsoftware/Dnn.Platform/releases/tag/v10.2.2
cvssv3.1 8.0 https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-ffq7-898w-9jc4
cvssv3.1 8.1 https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-ffq7-898w-9jc4
cvssv3.1_qr HIGH https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-ffq7-898w-9jc4
generic_textual HIGH https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-ffq7-898w-9jc4
ssvc Track https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-ffq7-898w-9jc4
cvssv3.1 8.0 https://nvd.nist.gov/vuln/detail/CVE-2026-40321
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2026-40321
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-40321
https://github.com/dnnsoftware/Dnn.Platform
https://github.com/dnnsoftware/Dnn.Platform/releases/tag/v10.2.2
https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-ffq7-898w-9jc4
https://nvd.nist.gov/vuln/detail/CVE-2026-40321
GHSA-ffq7-898w-9jc4 https://github.com/advisories/GHSA-ffq7-898w-9jc4
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H Found at https://github.com/dnnsoftware/Dnn.Platform
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H Found at https://github.com/dnnsoftware/Dnn.Platform/releases/tag/v10.2.2
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H Found at https://github.com/dnnsoftware/Dnn.Platform/releases/tag/v10.2.2
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-04-20T16:00:34Z/ Found at https://github.com/dnnsoftware/Dnn.Platform/releases/tag/v10.2.2
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H Found at https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-ffq7-898w-9jc4
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H Found at https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-ffq7-898w-9jc4
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-04-20T16:00:34Z/ Found at https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-ffq7-898w-9jc4
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2026-40321
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.06122
EPSS Score 0.00021
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:52:59.053938+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-ffq7-898w-9jc4/GHSA-ffq7-898w-9jc4.json 38.6.0