{"id":"CVE-2020-8439","details":"Monstra CMS through 3.0.4 allows remote authenticated users to take over arbitrary user accounts via a modified login parameter to an edit URI, as demonstrated by login=victim to the users/21/edit URI.","modified":"2026-04-10T04:28:23.861399Z","published":"2020-03-07T01:15:15.457Z","references":[{"type":"ADVISORY","url":"https://cert.ikiu.ac.ir/public-files/pages/attachments/11/02630f153869936d555a79f89d717f9c.pdf"},{"type":"EVIDENCE","url":"http://uploadboy.me/cn40ne6p89t6/POC.mp4.html"}],"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-2020-8439.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}