{"id":"CVE-2021-28001","details":"A cross-site scripting vulnerability was discovered in the Comments parameter in Textpattern CMS 4.8.4 which allows remote attackers to execute arbitrary code via a crafted payload entered into the URL field. The vulnerability is triggered by users visiting https://site.com/articles/welcome-to-your-site#comments-head.","modified":"2026-04-10T04:31:37.897147Z","published":"2021-08-19T14:39:31.717Z","references":[{"type":"EVIDENCE","url":"https://www.exploit-db.com/exploits/49616"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/textpattern/textpattern","events":[{"introduced":"0"},{"last_affected":"eb17367ddffc08ab9d7638b47b3ab700f232cd1e"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"4.8.4"}]}}],"versions":["4.2.0","4.3.0","4.4.0","4.4.1","4.5.0","4.5.1","4.5.2","4.6.0","4.6.0-beta","4.6.0-beta.2","4.6.0-beta.3","4.7.0","4.7.0-beta","4.7.0-beta.2","4.7.0-beta.3","4.7.0-rc.1","4.7.2","4.8.0-beta.2","4.8.1","4.8.2","4.8.3","4.8.4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-28001.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"}]}