{"id":"CVE-2020-26163","aliases":["EUVD-2020-18788","GHSA-5wp7-85p7-qq6v"],"status":"published","title":"BigBlueButton Greenlight before 2.5.6 allows HTTP header (Host and Origin) attacks, which can...","description":"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.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01531,"percentile":0.7497,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2020-09-30T15:28:54Z","modified":"2026-10-20T10:52:56Z","products":[{"vendor":"bigbluebutton","product":"greenlight"}],"references":[{"url":"https://www.sakshamanand.com/host-header-injection-bigbluebutton/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://github.com/bigbluebutton/greenlight/releases/tag/release-2.5.6","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://github.com/bigbluebutton/greenlight/pull/1543","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26163"},{"url":"https://github.com/advisories/GHSA-5wp7-85p7-qq6v"}],"sources":{"cve":[{"id":"CVE-2020-26163","description":"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.","status":"published","published":"2020-09-30T15:28:54Z","modified":"2024-08-04T15:49:07.14Z","updated_at":"2026-11-02T14:35:46.129376Z"}],"euvd":[{"id":"EUVD-2020-18788","description":"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.","status":"published","published":"2020-09-30T15:28:54Z","modified":"2024-08-04T15:49:07Z","updated_at":"2026-11-03T03:07:15.778249Z"}],"ghsa":[{"id":"GHSA-5wp7-85p7-qq6v","title":"BigBlueButton Greenlight before 2.5.6 allows HTTP header (Host and Origin) attacks, which can...","description":"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.","status":"published","published":"2022-05-24T17:29:53Z","modified":"2023-01-29T05:04:01Z","updated_at":"2026-11-02T14:45:27.507739Z"}],"nvd":[{"id":"CVE-2020-26163","description":"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.","status":"published","published":"2020-09-30T18:15:27.477Z","modified":"2026-06-17T03:07:44.24Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:17.70091Z"}],"osv":[{"id":"CVE-2020-26163","description":"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.","status":"published","published":"2020-09-30T18:15:27.477Z","modified":"2026-10-20T10:52:56.017007542Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:15.879068Z"}]}}