{"id":"CVE-2021-4321","aliases":["DEBIAN-CVE-2021-4321","DSA-5046-1","EUVD-2021-34150","GHSA-gr88-2rcg-w2cq"],"status":"published","title":"Policy bypass in Blink in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass...","description":"Policy bypass in Blink in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Low)","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00538,"percentile":0.45781,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2022-01-14T00:00:00Z","modified":"2026-10-23T18:04:38Z","fixes":[{"ecosystem":"Debian:12","package":"chromium","fixed_in":["97.0.4692.71-0.1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"chromium","fixed_in":["97.0.4692.71-0.1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"chromium","fixed_in":["97.0.4692.71-0.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"chromium","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"97.0.4692.71-0.1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"chromium","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"97.0.4692.71-0.1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"chromium","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"97.0.4692.71-0.1"}]}]},{"source":"osv","ecosystem":"Debian:11","package":"chromium","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"97.0.4692.71-0.1~deb11u1"}]}],"versions":["90.0.4430.212-1","93.0.4577.82-1"],"bundled":123}],"products":[{"vendor":"google","product":"chrome"}],"references":[{"url":"https://chromereleases.googleblog.com/2021/05/stable-channel-update-for-desktop_25.html","tags":["x_transferred","Release Notes","Vendor Advisory","advisory"]},{"url":"https://crbug.com/1161891","tags":["x_transferred","Exploit","Issue Tracking","Vendor Advisory","report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PQKT7EGDD2P3L7S3NXEDDRCPK4NNZNWJ/","tags":["x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4321"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PQKT7EGDD2P3L7S3NXEDDRCPK4NNZNWJ"},{"url":"https://github.com/advisories/GHSA-gr88-2rcg-w2cq"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-4321","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-4321","description":"Policy bypass in Blink in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Low)","status":"published","published":"2023-07-28T23:26:53.981Z","modified":"2025-02-13T16:28:40.942Z","updated_at":"2026-11-02T14:33:07.697752Z"}],"euvd":[{"id":"EUVD-2021-34150","description":"Policy bypass in Blink in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Low)","status":"published","published":"2023-07-28T23:26:53Z","modified":"2025-02-13T16:28:40Z","cvss":[{"version":"","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"none"}],"updated_at":"2026-11-03T00:03:52.752782Z"}],"ghsa":[{"id":"GHSA-gr88-2rcg-w2cq","title":"Policy bypass in Blink in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass...","description":"Policy bypass in Blink in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Low)","status":"published","published":"2023-07-29T00:30:47Z","modified":"2024-04-04T06:25:11Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T14:56:42.088122Z"}],"nvd":[{"id":"CVE-2021-4321","description":"Policy bypass in Blink in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Low)","status":"published","published":"2023-07-29T00:15:10.553Z","modified":"2026-06-17T04:19:30.103Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:07:07.764332Z"}],"osv":[{"id":"CVE-2021-4321","description":"Policy bypass in Blink in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Low)","status":"published","published":"2023-07-29T00:15:10.553Z","modified":"2026-03-14T11:15:51.48702Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:21.877444Z"},{"id":"DEBIAN-CVE-2021-4321","description":"Policy bypass in Blink in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Low)","status":"published","published":"2023-07-29T00:15:10.553Z","modified":"2026-10-23T18:04:38.987983373Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:35.799676Z"},{"id":"DSA-5046-1","title":"chromium - security update","status":"published","published":"2022-01-14T00:00:00Z","modified":"2026-03-09T02:11:02.079606Z","updated_at":"2026-11-02T15:46:17.543497Z"}]}}