CVE-2023-49279
LOWUmbraco <7.15.11, <8.18.9, <10.7.0, <11.5.0, <12.2.0 - XSS
Title source: llmDescription
Umbraco is an ASP.NET content management system (CMS). Starting in version 7.0.0 and prior to versions 7.15.11, 8.18.9, 10.7.0, 11.5.0, and 12.2.0, a 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. Versions 7.15.11, 8.18.9, 10.7.0, 11.5.0, and 12.2.0 contain a patch for this issue. Some workarounds are available. Implement the server side file validation or serve all media from an different host (e.g cdn) than where Umbraco is hosted.
References (2)
Core 2
Core References
Vendor Advisory x_refsource_confirm
https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-6xmx-85x3-4cv2
Product x_refsource_misc
https://docs.umbraco.com/umbraco-cms/reference/security/serverside-file-validation
Scores
CVSS v3
3.7
EPSS
0.0045
EPSS Percentile
63.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-79
Status
published
Products (2)
nuget/Umbraco.CMS
7.0.0 - 7.15.11NuGet
umbraco/umbraco_cms
7.0.0 - 7.15.11
Published
Dec 12, 2023
Tracked Since
Feb 18, 2026