{"id":"CVE-2020-26163","details":"BigBlueButton Greenlight before 2.5.6 allows HTTP header (Host and Origin) attacks, which can result in Account Takeover if a victim follows a spoofed password-reset link.","modified":"2026-04-10T04:25:21.359043Z","published":"2020-09-30T18:15:27.477Z","references":[{"type":"ADVISORY","url":"https://github.com/bigbluebutton/greenlight/releases/tag/release-2.5.6"},{"type":"FIX","url":"https://github.com/bigbluebutton/greenlight/pull/1543"},{"type":"EVIDENCE","url":"https://www.sakshamanand.com/host-header-injection-bigbluebutton/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/bigbluebutton/greenlight","events":[{"introduced":"0"},{"fixed":"7411eba8e0feced5beb56bfd51a52c5a600ed6d9"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"2.5.6"}]}}],"versions":["release-2.0.0","release-2.0.1","release-2.0.2","release-2.0.3","release-2.0.4","release-2.0.5","release-2.0.6","release-2.0.7","release-2.0.8","release-2.0.9","release-2.1.0","release-2.1.1","release-2.1.2","release-2.1.3","release-2.2.0","release-2.2.1","release-2.2.2","release-2.2.3","release-2.3.0","release-2.3.1","release-2.3.2","release-2.3.3","release-2.3.4","release-2.4","release-2.4-b1","release-2.4-b2","release-2.4-b3","release-2.4-rc1","release-2.4.1","release-2.4.2","release-2.4.2-rc.1","release-2.5","release-2.5-rc.1","release-2.5.1","release-2.5.2","release-2.5.3","release-2.5.5"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-26163.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}