{"id":"CVE-2020-20691","details":"An issue in Monstra CMS v3.0.4 allows attackers to execute arbitrary web scripts or HTML via bypassing the file extension filter and uploading crafted HTML files.","modified":"2026-04-10T04:24:21.993028Z","published":"2021-09-27T22:15:07.477Z","references":[{"type":"REPORT","url":"https://github.com/monstra-cms/monstra/issues/461"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/monstra-cms/monstra","events":[{"introduced":"0"},{"last_affected":"81bad8b6649253bd972ac4158816189d38366216"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"3.0.4"}]}}],"versions":["v2.2.1","v3.0.0","v3.0.1","v3.0.2","v3.0.3","v3.0.4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-20691.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"}]}