{
    "id": "CVE-2021-30533",
    "published": "2021-06-07 20:15:08",
    "last_modified": "2026-06-17 03:50:24",
    "cvss_score": "6.5",
    "cvss_severity": "MEDIUM",
    "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",
    "cwe": "CWE-863",
    "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.",
    "epss_score": "0.16611",
    "epss_percentile": "0.96913",
    "kev": 1,
    "kev_due": "2022-07-18",
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:27:38",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2022-07-18."
    },
    "products": [
        {
            "vendor": "fedoraproject",
            "product": "fedora"
        },
        {
            "vendor": "google",
            "product": "chrome"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2021-30533",
        "date_added": "2022-06-27",
        "due_date": "2022-07-18",
        "vendor": "Google",
        "product": "Chromium PopupBlocker",
        "name": "Google Chromium PopupBlocker Security Bypass Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "https://chromereleases.googleblog.com/2021/05/stable-channel-update-for-desktop_25.html",
        "https://crbug.com/1145553",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ETMZL6IHCTCTREEL434BQ4THQ7EOHJ43/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAT6EOXVQFE6JFMFQF4IKAOUQSHMHL54/",
        "https://security.gentoo.org/glsa/202107-06",
        "https://chromereleases.googleblog.com/2021/05/stable-channel-update-for-desktop_25.html",
        "https://crbug.com/1145553",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ETMZL6IHCTCTREEL434BQ4THQ7EOHJ43/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAT6EOXVQFE6JFMFQF4IKAOUQSHMHL54/",
        "https://security.gentoo.org/glsa/202107-06",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30533"
    ]
}