{"id":"CVE-2021-27902","aliases":["GHSA-3jxh-789f-p7m6"],"url":"https://o3.security/vulnerability/CVE-2021-27902","summary":"Craft CMS Cross-site Scripting Vulnerability","details":"An issue was discovered in Craft CMS before 3.6.0. In some circumstances, a potential XSS vulnerability existed in connection with front-end forms that accepted user uploads.","published":"2021-06-30T12:15:07.610Z","modified":"2026-08-07T15:15:22.955460Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Packagist","name":"craftcms/cms","fixedVersion":"3.6.0"}],"fix":{"url":"https://github.com/craftcms/cms/commit/8ee85a8f03c143fa2420e7d6f311d95cae3b19ce","label":"craftcms/cms@8ee85a8"},"references":[{"type":"ADVISORY","url":"https://github.com/craftcms/cms/blob/develop/CHANGELOG.md#360---2021-01-26"},{"type":"ADVISORY","url":"https://github.com/craftcms/cms/blob/develop/CHANGELOG.md#security-1"},{"type":"FIX","url":"https://github.com/craftcms/cms/commit/8ee85a8f03c143fa2420e7d6f311d95cae3b19ce"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T15:15:22.955460Z"}}