{"id":"CVE-2021-4143","aliases":["EUVD-2021-34012","GHSA-rq88-x89h-6r64"],"status":"published","title":"Cross-site Scripting (XSS) - Generic in bigbluebutton/bigbluebutton","description":"Cross-site Scripting (XSS) - Generic in GitHub repository bigbluebutton/bigbluebutton prior to 2.4.0.","severity":{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0092,"percentile":0.60752,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2022-01-19T22:20:09Z","modified":"2026-10-20T10:54:58Z","products":[{"vendor":"bigbluebutton","product":"bigbluebutton"},{"vendor":"bigbluebutton","product":"bigbluebutton/bigbluebutton"}],"references":[{"url":"https://huntr.dev/bounties/e67603e6-8497-4ab6-b93a-02c26407d443","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/bigbluebutton/bigbluebutton/commit/62040bdcb3c2f993ba72ab89f4db2015e18d1706","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4143"},{"url":"https://github.com/advisories/GHSA-rq88-x89h-6r64"}],"sources":{"cve":[{"id":"CVE-2021-4143","title":"Cross-site Scripting (XSS) - Generic in bigbluebutton/bigbluebutton","description":"Cross-site Scripting (XSS) - Generic in GitHub repository bigbluebutton/bigbluebutton prior to 2.4.0.","status":"published","published":"2022-01-19T22:20:09Z","modified":"2024-08-03T17:16:04.257Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:33:08.045407Z"}],"euvd":[{"id":"EUVD-2021-34012","description":"Cross-site Scripting (XSS) - Generic in GitHub repository bigbluebutton/bigbluebutton prior to 2.4.0.","status":"published","published":"2022-01-19T22:20:09Z","modified":"2024-08-03T17:16:04Z","cvss":[{"version":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-03T03:25:10.888157Z"}],"ghsa":[{"id":"GHSA-rq88-x89h-6r64","title":"Cross-site Scripting (XSS) - Generic in GitHub repository bigbluebutton/bigbluebutton prior to 2...","description":"Cross-site Scripting (XSS) - Generic in GitHub repository bigbluebutton/bigbluebutton prior to 2.4.0.","status":"published","published":"2022-01-21T00:00:53Z","modified":"2023-02-03T05:05:05Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:53:41.038786Z"}],"nvd":[{"id":"CVE-2021-4143","description":"Cross-site Scripting (XSS) - Generic in GitHub repository bigbluebutton/bigbluebutton prior to 2.4.0.","status":"published","published":"2022-01-19T23:15:08.113Z","modified":"2026-06-17T04:19:06.583Z","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":"3.0","score":8.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"},{"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":"2026-11-02T14:07:03.821385Z"}],"osv":[{"id":"CVE-2021-4143","description":"Cross-site Scripting (XSS) - Generic in GitHub repository bigbluebutton/bigbluebutton prior to 2.4.0.","status":"published","published":"2022-01-19T23:15:08.113Z","modified":"2026-10-20T10:54:58.35373216Z","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":"2026-11-02T15:44:21.557945Z"}]}}