{"id":"CVE-2023-49279","aliases":["GHSA-6xmx-85x3-4cv2"],"url":"https://o3.security/vulnerability/CVE-2023-49279","summary":"Umbraco CMS vulnerable to stored XSS via SVG File Upload","details":"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.","published":"2023-12-12T19:35:05.931Z","modified":"2026-07-15T01:48:52.608054904Z","cvss":{"score":3.7,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"NuGet","name":"Umbraco.CMS","fixedVersion":"7.15.11"},{"ecosystem":"NuGet","name":"Umbraco.CMS","fixedVersion":"8.18.9"},{"ecosystem":"NuGet","name":"Umbraco.CMS","fixedVersion":"10.7.0"},{"ecosystem":"NuGet","name":"Umbraco.CMS","fixedVersion":"11.5.0"},{"ecosystem":"NuGet","name":"Umbraco.CMS","fixedVersion":"12.2.0"}],"fix":null,"references":[{"type":"WEB","url":"https://docs.umbraco.com/umbraco-cms/reference/security/serverside-file-validation"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/49xxx/CVE-2023-49279.json"},{"type":"ADVISORY","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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:48:52.608054904Z"}}