{"id":"CVE-2020-27608","aliases":["EUVD-2020-20115","GHSA-43wq-r34m-56ch"],"status":"published","title":"In BigBlueButton before 2.2.28 (or earlier), uploaded presentations are sent to clients without a...","description":"In BigBlueButton before 2.2.28 (or earlier), uploaded presentations are sent to clients without a Content-Type header, which allows XSS, as demonstrated by a .png file extension for an HTML document.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00819,"percentile":0.57512,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2020-10-21T14:07:51Z","modified":"2026-10-24T10:30:59Z","products":[{"vendor":"bigbluebutton","product":"bigbluebutton"}],"references":[{"url":"https://www.golem.de/news/big-blue-button-das-grosse-blaue-sicherheitsrisiko-2010-151610.html","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27608"},{"url":"https://github.com/advisories/GHSA-43wq-r34m-56ch"}],"sources":{"cve":[{"id":"CVE-2020-27608","description":"In BigBlueButton before 2.2.28 (or earlier), uploaded presentations are sent to clients without a Content-Type header, which allows XSS, as demonstrated by a .png file extension for an HTML document.","status":"published","published":"2020-10-21T14:07:51Z","modified":"2024-08-04T16:18:44.818Z","updated_at":"2026-11-02T14:35:53.236501Z"}],"euvd":[{"id":"EUVD-2020-20115","description":"In BigBlueButton before 2.2.28 (or earlier), uploaded presentations are sent to clients without a Content-Type header, which allows XSS, as demonstrated by a .png file extension for an HTML document.","status":"published","published":"2020-10-21T14:07:51Z","modified":"2024-08-04T16:18:44Z","updated_at":"2026-11-03T03:07:12.435876Z"}],"ghsa":[{"id":"GHSA-43wq-r34m-56ch","title":"In BigBlueButton before 2.2.28 (or earlier), uploaded presentations are sent to clients without a...","description":"In BigBlueButton before 2.2.28 (or earlier), uploaded presentations are sent to clients without a Content-Type header, which allows XSS, as demonstrated by a .png file extension for an HTML document.","status":"published","published":"2022-05-24T17:31:44Z","modified":"2023-01-29T05:04:27Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:45:33.67375Z"}],"nvd":[{"id":"CVE-2020-27608","description":"In BigBlueButton before 2.2.28 (or earlier), uploaded presentations are sent to clients without a Content-Type header, which allows XSS, as demonstrated by a .png file extension for an HTML document.","status":"published","published":"2020-10-21T15:15:27.25Z","modified":"2026-06-17T03:09:20.933Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:20.704992Z"}],"osv":[{"id":"CVE-2020-27608","description":"In BigBlueButton before 2.2.28 (or earlier), uploaded presentations are sent to clients without a Content-Type header, which allows XSS, as demonstrated by a .png file extension for an HTML document.","status":"published","published":"2020-10-21T15:15:27.25Z","modified":"2026-10-24T10:30:59.606136863Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:16.248747Z"}]}}