Umbraco CMS vulnerable to stored Cross-site Scripting in the "dictionary name" on Dictionary section
Impact
This can be leveraged to gain access to higher-privilege endpoints, e.g. if you get a user with admin privileges to run the code, you can potentially elevate all users and grant them admin privileges or access protected content.
Patches
Will be patched in 14.3.1 and 15.0.0.
Workarounds
Ensure that access to the Dictionary section is only granted to trusted users.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @umbraco-cms/backoffice | >= 14.0.0, < 14.3.1 | 14.3.1 |
| .NET (NuGet) | Umbraco.Cms.StaticAssets | >= 14.0.0, < 14.3.1 | 14.3.1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-79, CWE-80- Platform
- npm, .NET (NuGet)
- Package
@umbraco-cms/backoffice, Umbraco.Cms.StaticAssets- Disclosed
- 22.10.2024
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-c5g6-6xf7-qxp3 - CC BY 4.0
Vulnerability history: Umbraco.Cms.StaticAssets
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 10.2024 01.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 2
Disclosures per year
- 2024: 1
- 2025: 1
- 2026: 0
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Umbraco CMS vulnerable to stored Cross-site Scripting in the "dictionary name" on Dictionary section this entry
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