CVE-2025-24012: Umbraco.Cms.StaticAssets Cross-Site Scripting Vulnerability
MODERATECVE-2025-24012 is a MODERATE (CVSS 4.6) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Umbraco.Cms.StaticAssets libraries in the NuGet ecosystem. The issue involves xss/html injection vulnerability in umbraco backoffice components. Remediation is available by upgrading affected packages to version 14.3.2, 15.1.2.
CVE-2025-24012 at a Glance
Security Impact
CVSS: 4.6
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N).
How to Fix CVE-2025-24012
To remediate this vulnerability, upgrade all affected Umbraco.Cms.StaticAssets dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade Umbraco.Cms.StaticAssets to 14.3.2Upgrade Umbraco.Cms.StaticAssets to 15.1.2npm install @umbraco-cms/backoffice@14.3.2npm install @umbraco-cms/backoffice@15.1.2Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for Umbraco.Cms.StaticAssetsHow to Check if You Are Affected
To determine whether your application is affected by CVE-2025-24012, inspect your project dependencies for Umbraco.Cms.StaticAssets:
inspect dependencies for Umbraco.Cms.StaticAssetsAnalyze the terminal output to locate any version of Umbraco.Cms.StaticAssets in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 14.3.2), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Umbraco.Cms.StaticAssets, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2025-24012 Affected Umbraco.Cms.StaticAssets Versions
4 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
Umbraco.Cms.StaticAssets
|
NuGet |
≥ 14.0.0
< 14.3.2
|
14.3.2
|
|
Umbraco.Cms.StaticAssets
|
NuGet |
≥ 15.0.0
< 15.1.2
|
15.1.2
|
|
@umbraco-cms/backoffice
|
npm |
≥ 14.0.0
< 14.3.2
|
14.3.2
|
|
@umbraco-cms/backoffice
|
npm |
≥ 15.0.0
< 15.1.2
|
15.1.2
|
References
Frequently Asked Questions
What is CVE-2025-24012?
Which Umbraco.Cms.StaticAssets versions are affected?
What version fixes CVE-2025-24012?
Is Umbraco.Cms.StaticAssets affected?
Is @umbraco-cms/backoffice affected?
What is the CVSS score of CVE-2025-24012?
What CWE is associated with CVE-2025-24012?
How can I check NuGet dependencies for CVE-2025-24012?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-wv8v-rmw2-25wc",
"modified" : "2025-02-20T22:51:54Z",
"published" : "2025-01-21T19:59:13Z",
"aliases" : [ "CVE-2025-24012" ],
"summary" : "XSS/HTML Injection Vulnerability in Umbraco Backoffice Components",
"details" : "### Impact\nAuthenticated users are able to exploit an XSS vulnerability when viewing certain localized backoffice components.\n\n### Patches\nWill be patched in 14.3.2 and 15.1.2.\n\nNote:\nThis issue was reported by Pratik Patil from NetSPI @Nexusss-ppatil",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "NuGet",
"name" : "Umbraco.Cms.StaticAssets"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "14.0.0"
}, {
"fixed" : "14.3.2"
} ]
} ]
}, {
"package" : {
"ecosystem" : "NuGet",
"name" : "Umbraco.Cms.StaticAssets"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "15.0.0"
}, {
"fixed" : "15.1.2"
} ]
} ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "@umbraco-cms/backoffice"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "14.0.0"
}, {
"fixed" : "14.3.2"
} ]
} ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "@umbraco-cms/backoffice"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "15.0.0"
}, {
"fixed" : "15.1.2"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-wv8v-rmw2-25wc"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-24012"
}, {
"type" : "WEB",
"url" : "https://github.com/umbraco/Umbraco-CMS/commit/d4f8754f933895b3a329296e25ddea6f84a0aea2"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/umbraco/Umbraco-CMS"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-79" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2025-01-21T19:59:13Z",
"nvd_published_at" : "2025-01-21T16:15:14Z"
}
}