CVE-2023-49279: Umbraco.CMS Cross-Site Scripting Vulnerability
LOWCVE-2023-49279 is a LOW (CVSS 0.0) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Umbraco.CMS libraries in the NuGet ecosystem. The issue involves stored xss via svg file upload. Remediation is available by upgrading affected packages to version 7.15.11, 8.18.9, 10.7.0, 11.5.0, 12.2.0.
CVE-2023-49279 at a Glance
Security Impact
CVSS: 0.0
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:N).
How to Fix CVE-2023-49279
To remediate this vulnerability, upgrade all affected Umbraco.CMS 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 to 7.15.11Upgrade Umbraco.CMS to 8.18.9Upgrade Umbraco.CMS to 10.7.0Upgrade Umbraco.CMS to 11.5.0Upgrade Umbraco.CMS to 12.2.0Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for Umbraco.CMSHow to Check if You Are Affected
To determine whether your application is affected by CVE-2023-49279, inspect your project dependencies for Umbraco.CMS:
inspect dependencies for Umbraco.CMSAnalyze the terminal output to locate any version of Umbraco.CMS in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 7.15.11), 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, 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-2023-49279 Affected Umbraco.CMS Versions
5 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
Umbraco.CMS
|
NuGet |
≥ 7.0.0
< 7.15.11
|
7.15.11
|
|
Umbraco.CMS
|
NuGet |
≥ 8.0.0
< 8.18.9
|
8.18.9
|
|
Umbraco.CMS
|
NuGet |
≥ 9.0.0
< 10.7.0
|
10.7.0
|
|
Umbraco.CMS
|
NuGet |
≥ 11.0.0
< 11.5.0
|
11.5.0
|
|
Umbraco.CMS
|
NuGet |
≥ 12.0.0
< 12.2.0
|
12.2.0
|
References
Frequently Asked Questions
What is CVE-2023-49279?
Which Umbraco.CMS versions are affected?
What version fixes CVE-2023-49279?
Is Umbraco.CMS affected?
What is the CVSS score of CVE-2023-49279?
What CWE is associated with CVE-2023-49279?
How can I check NuGet dependencies for CVE-2023-49279?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-6xmx-85x3-4cv2",
"modified" : "2023-12-13T13:30:53Z",
"published" : "2023-12-13T13:30:53Z",
"aliases" : [ "CVE-2023-49279" ],
"summary" : "Stored XSS via SVG File Upload",
"details" : "#### Impact\nA user with access to the backoffice can upload SVG files that include scripts. If the user can trick another user to load the media directly in a browser, the scripts can be executed.\n\n#### Workaround\nImplement the server side file validation\nhttps://docs.umbraco.com/umbraco-cms/reference/security/serverside-file-validation\n\nor \n\nServe all media from an different host (e.g cdn) that where umbraco is hosted",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "NuGet",
"name" : "Umbraco.CMS"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "7.0.0"
}, {
"fixed" : "7.15.11"
} ]
} ]
}, {
"package" : {
"ecosystem" : "NuGet",
"name" : "Umbraco.CMS"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "8.0.0"
}, {
"fixed" : "8.18.9"
} ]
} ]
}, {
"package" : {
"ecosystem" : "NuGet",
"name" : "Umbraco.CMS"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "9.0.0"
}, {
"fixed" : "10.7.0"
} ]
} ]
}, {
"package" : {
"ecosystem" : "NuGet",
"name" : "Umbraco.CMS"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "11.0.0"
}, {
"fixed" : "11.5.0"
} ]
} ]
}, {
"package" : {
"ecosystem" : "NuGet",
"name" : "Umbraco.CMS"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "12.0.0"
}, {
"fixed" : "12.2.0"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-6xmx-85x3-4cv2"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-49279"
}, {
"type" : "WEB",
"url" : "https://docs.umbraco.com/umbraco-cms/reference/security/serverside-file-validation"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/umbraco/Umbraco-CMS"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-79" ],
"severity" : "LOW",
"github_reviewed" : true,
"github_reviewed_at" : "2023-12-13T13:30:53Z",
"nvd_published_at" : "2023-12-12T20:15:08Z"
}
}