{"id":"CVE-2024-35218","aliases":["GHSA-gvpc-3pj6-4m9w"],"url":"https://o3.security/vulnerability/CVE-2024-35218","summary":"Umbraco CMS Vulnerable to Stored XSS on Content Page Through Markdown Editor Preview Pane","details":"Umbraco CMS is an ASP.NET CMS used by more than 730.000 websites. Stored Cross-site scripting (XSS) enable attackers that have access to backoffice to bring malicious content into a website or application. This vulnerability has been patched in version(s) 8.18.13, 10.8.4, 12.3.7, 13.1.1 by implementing IHtmlSanitizer.\n\n\n\n\n","published":"2024-05-21T13:42:27.260Z","modified":"2026-08-12T03:51:15.522990068Z","cvss":{"score":4.2,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"NuGet","name":"UmbracoCms.Core","fixedVersion":"8.18.13"},{"ecosystem":"NuGet","name":"UmbracoCms.Core","fixedVersion":"10.8.4"},{"ecosystem":"NuGet","name":"UmbracoCms.Core","fixedVersion":"12.3.7"},{"ecosystem":"NuGet","name":"UmbracoCms.Core","fixedVersion":"13.1.1"}],"fix":{"url":"https://github.com/umbraco/Umbraco-CMS/commit/1b712fe6ec52aa4e71b3acf63e393c8e6ab85385","label":"umbraco/Umbraco-CMS@1b712fe"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/35xxx/CVE-2024-35218.json"},{"type":"ADVISORY","url":"https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-gvpc-3pj6-4m9w"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-35218"},{"type":"FIX","url":"https://github.com/umbraco/Umbraco-CMS/commit/1b712fe6ec52aa4e71b3acf63e393c8e6ab85385"},{"type":"FIX","url":"https://github.com/umbraco/Umbraco-CMS/commit/a2684069b1e9976444f60b4b37a80be05b87f6b6"},{"type":"FIX","url":"https://github.com/umbraco/Umbraco-CMS/commit/cbf9f9bcd199d7ca0412be3071d275556f10b7ba"},{"type":"FIX","url":"https://github.com/umbraco/Umbraco-CMS/commit/d090176272d07500dac0daee7c598aa8bb321050"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:15.522990068Z"}}