DotNetNuke.Core has stored cross-site-scripting (XSS) via SVG upload
Priority MEDIUM 47CWE-87Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.06412 93rd percentileScored 2026-11-07
Fix Fixed Dnn.Platform (dnnsoftware): 10.2.2DotNetNuke.Core (NuGet): 10.2.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| DotNetNuke (DNN) | Dnn.Platform | before 10.2.2 | 10.2.2 | Patch available | CNA |
| — | DotNetNuke.Core (NuGet) | before 10.2.2 | 10.2.2 | Patch available | GHSA-ffq7-898w-9jc4 |
- Dnn.Platform VendorDotNetNuke (DNN) Affected before 10.2.2 Fixed in 10.2.2 Patch available CNA
- DotNetNuke.Core (NuGet) Vendor— Affected before 10.2.2 Fixed in 10.2.2 Patch available GHSA-ffq7-898w-9jc4
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:dnnsoftware:dotnetnuke:*:*:*:*:*:*:*:* | before 10.2.2 | Vulnerable | DotNetNuke (DNN) |
- cpe:2.3:a:dnnsoftware:dotnetnuke:*:*:*:*:*:*:*:* Versions before 10.2.2 Vulnerable ·DotNetNuke (DNN)
Remediation
- Fix · CNA Dnn.Platform (dnnsoftware) Fixed in 10.2.2
- Fix · GHSA-ffq7-898w-9jc4 DotNetNuke.Core (NuGet) Fixed in 10.2.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-40321
- 2026-10-03 Alias added: GHSA-ffq7-898w-9jc4
- 2026-10-25 EPSS moved to the 90th–95th percentile
- 2026-10-25 Priority changed: LOW → MEDIUM
References
More DotNetNuke (DNN) Dotnetnuke vulnerabilities
- TI-2017-07201 Code injection in DotNetNuke CMS Fixed in 9.1.1 KEVCVSS 3.1HIGH 8.8
- TI-2018-12944 DNN (aka DotNetNuke) 9.2 through 9.2.2 uses a weak encryption algorithm to protect input… KEVCVSS 3.1HIGH 7.5
- TI-2018-11271 DNN (aka DotNetNuke) 9.2 through 9.2.1 uses a weak encryption algorithm to protect input parameters. KEVCVSS 3.1HIGH 7.5
- TI-2015-02468 The installation wizard in DotNetNuke (DNN) before 7.4.1 allows remote attackers to… CVSS 3.0CRITICAL 9.8
- TI-2025-39546 DNN Insufficient Access Control - Image Upload allows for Site Content Overwrite CVSS 3.1CRITICAL 10.0
- TI-2018-12945 DNN (aka DotNetNuke) 9.2 through 9.2.2 incorrectly converts encryption key source values… CVSS 3.1HIGH 7.5
Sources
- CVE-2026-40321 · CVE Program
- CVE-2026-40321 · NVD
- FIRST EPSS
- GHSA-ffq7-898w-9jc4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences