{"id":"CVE-2021-41750","aliases":["GHSA-6hjc-m38h-7jhh"],"url":"https://o3.security/vulnerability/CVE-2021-41750","summary":"Cross-site Scripting in SEOmatic plugin","details":"A cross-site scripting (XSS) vulnerability in the SEOmatic plugin 3.4.10 for Craft CMS 3 allows remote attackers to inject arbitrary web script via a GET to /index.php?action=seomatic/file/seo-file-link with url parameter containing the base64 encoded URL of a malicious web page / file and fileName parameter containing an arbitrary filename with the intended content-type to be rendered in the user's browser as the extension.","published":"2022-06-12T12:15:07.910Z","modified":"2026-07-09T01:07:36.780892Z","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":0,"affectedPackages":[{"ecosystem":"Packagist","name":"nystudio107/craft-seomatic","fixedVersion":"3.4.11"}],"fix":{"url":"https://github.com/nystudio107/craft-seomatic/commit/4e46b792ce973ac0c652fb330055f41aca1981c8","label":"nystudio107/craft-seomatic@4e46b79"},"references":[{"type":"ADVISORY","url":"https://github.com/nystudio107/craft-seomatic/blob/develop/CHANGELOG.md"},{"type":"FIX","url":"https://github.com/nystudio107/craft-seomatic/commit/4e46b792ce973ac0c652fb330055f41aca1981c8"},{"type":"FIX","url":"https://github.com/nystudio107/craft-seomatic/commit/5f2cdc7c39e0a4bfb60d2f84131508f0a87b2873"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T01:07:36.780892Z"}}