{"cve_id":"CVE-2021-30533","published":"2021-06-07T20:15:08.730000+00:00","last_modified":"2026-06-17T03:50:24.617000+00:00","vuln_status":"Analyzed","description":"Insufficient policy enforcement in PopupBlocker in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass navigation restrictions via a crafted iframe.","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","base_score":6.5,"base_severity":"MEDIUM","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"REQUIRED","scope":"UNCHANGED","impact_c":"NONE","impact_i":"HIGH","impact_a":"NONE","cwe_ids":["CWE-863"],"in_kev":true,"kev_date_added":"2022-06-27","kev_ransomware":false,"epss_score":0.16742,"epss_percentile":0.97035,"cap_rule_version":"0.1.1","stage":"INITIAL_ACCESS","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":true,"grant_access":"PRIV","caps":["AUTH_BYPASS","PRIV_GAIN","TAMPER"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-09-18T09:44:49.576734+00:00","first_seen":"2021-06-07T20:15:08.730000+00:00","kev_first_seen":"2022-06-27T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["fedoraproject","google"],"products":["chrome","fedora"],"affected":[{"vendor":"fedoraproject","product":"fedora","ranges":["33","34"]},{"vendor":"google","product":"chrome","ranges":["< 91.0.4472.77"]}]}