NIST deprecates RSA-2048 from 2030. Find every one of them before attackers do.
📦
📦 npm.NET NuGet
Not in CISA KEV
MEDIUM severity

XSS/HTML Injection Vulnerability in Umbraco Backoffice ComponentsGHSA-wv8v-rmw2-25wc

MEDIUMFix: umbraco/Umbraco-CMS@d4f8754

GHSA-wv8v-rmw2-25wc is a medium-severity (CVSS 4.6) Cross-site Scripting (XSS) vulnerability in @umbraco-cms/backoffice. A fix is available for @umbraco-cms/backoffice — see the affected versions and patch details below.

Also known asCVE-2025-24012
Published
Updated
Affected
4 pkgs
Patched
4 / 4
Exploits
None indexed
Exploitation data as of Nov 1, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-wv8v-rmw2-25wc.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk+0.01%
Lower risk than most CVEs20th percentile — riskier than 20% of all scored CVEsHighest risk
0.00%0.47%0.93%1.39%0.9%0.3%May 26Aug 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

4 pkgs affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

0other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
@umbraco-cms/backofficenpm
13Kdownloads / week

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.

Affected Packages

4 total 4 fixed
EcosystemPackageVulnerable rangeFix
📦npm@umbraco-cms/backoffice≥ 14.0.0&&< 14.3.214.3.2npm install @umbraco-cms/backoffice@14.3.2
📦npm@umbraco-cms/backoffice≥ 15.0.0&&< 15.1.215.1.2npm install @umbraco-cms/backoffice@15.1.2
.NETNuGetUmbraco.Cms.StaticAssets≥ 14.0.0&&< 14.3.214.3.2dotnet add package Umbraco.Cms.StaticAssets --version 14.3.2
.NETNuGetUmbraco.Cms.StaticAssets≥ 15.0.0&&< 15.1.215.1.2dotnet add package Umbraco.Cms.StaticAssets --version 15.1.2

Affected Products

1 product · 2 configurations
Application
umbraco cmsumbraco
≥ 15.0.0 && < 15.1.2
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for @umbraco-cms/backoffice, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update @umbraco-cms/backoffice to 14.3.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-wv8v-rmw2-25wc is resolved across your whole dependency graph.

  3. Workarounds

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

### 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
O3 Security · Impact-Aware SCA

Is GHSA-wv8v-rmw2-25wc in your dependencies?

Find it across npm, NuGet, including transitive dependencies.

Scan my dependencies How O3 SCA works
XSS/HTML Injection Vulnerability in Umbraco Backoffice…