{"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":"2026-07-08T20:30:54.774043Z","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":"81bad8b6649253bd972ac4158816189d38366216"},{"last_affected":"81bad8b6649253bd972ac4158816189d38366216"}],"database_specific":{"cpe":"cpe:2.3:a:monstra:monstra_cms:3.0.4:*:*:*:*:*:*:*","extracted_events":[{"introduced":"3.0.4"},{"last_affected":"3.0.4"}],"source":"CPE_STRING"}}],"versions":["3.0.4","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"}]}