XSS/HTML Injection Vulnerability in Umbraco Backoffice Components
Impact
Authenticated users are able to exploit an XSS vulnerability when viewing certain localized backoffice components.
Patches
Will be patched in 14.3.2 and 15.1.2.
Note: This issue was reported by Pratik Patil from NetSPI @Nexusss-ppatil
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, < 14.3.2, >= 15.0.0, < 15.1.2 | 14.3.2, 15.1.2 |
| .NET (NuGet) | Umbraco.Cms.StaticAssets | >= 14.0.0, < 14.3.2, >= 15.0.0, < 15.1.2 | 14.3.2, 15.1.2 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- npm, .NET (NuGet)
- Package
@umbraco-cms/backoffice, Umbraco.Cms.StaticAssets- Disclosed
- 21.01.2025
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-wv8v-rmw2-25wc - CC BY 4.0
Vulnerability history: @umbraco-cms/backoffice
All published vulnerabilities of this package (npm package), 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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XSS/HTML Injection Vulnerability in Umbraco Backoffice Components this entry
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