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exploitable use-after-free vulnerability exists in WebKitGTK browser version 2.30.1 x64. A specially crafted HTML web page can cause a use-after-free condition, resulting in a remote code execution. The victim needs to visit a malicious web site to trigger this vulnerability.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-13584.json","reference_id":"","reference_type":"","scores":[{"value":"8.8","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-13584.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2020-13584","reference_id":"","reference_type":"","scores":[{"value":"0.00783","scoring_system":"epss","scoring_elements":"0.74095","published_at":"2026-06-04T12:55:00Z"},{"value":"0.00783","scoring_system":"epss","scoring_elements":"0.74128","published_at":"2026-06-05T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2020-13584"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13543","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13543"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13584","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13584"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9947","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9947"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9948","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9948"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9951","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9951"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9983","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9983"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1817","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1817"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1820","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1820"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1825","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1825"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1826","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1826"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30661","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30661"},{"reference_url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml","reference_id":"","reference_type":"","scores":[{"value":"8.8","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=1901212","reference_id":"1901212","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1901212"},{"reference_url":"https://security.gentoo.org/glsa/202012-10","reference_id":"GLSA-202012-10","reference_type":"","scores":[],"url":"https://security.gentoo.org/glsa/202012-10"},{"reference_url":"https://access.redhat.com/errata/RHSA-2021:1586","reference_id":"RHSA-2021:1586","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2021:1586"},{"reference_url":"https://access.redhat.com/errata/RHSA-2025:10364","reference_id":"RHSA-2025:10364","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2025:10364"}],"fixed_packages":[],"aliases":["CVE-2020-13584"],"risk_score":4.0,"exploitability":"0.5","weighted_severity":"7.9","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-hcfs-g8h6-rkgh"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/5369?format=json","vulnerability_id":"VCID-n9vd-cbw6-hfgd","summary":"multiple 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use after free issue was addressed with improved memory management. This issue is fixed in Safari 14.0. Processing maliciously crafted web content may lead to arbitrary code execution.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-9951.json","reference_id":"","reference_type":"","scores":[{"value":"8.8","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-9951.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2020-9951","reference_id":"","reference_type":"","scores":[{"value":"0.01995","scoring_system":"epss","scoring_elements":"0.83956","published_at":"2026-06-04T12:55:00Z"},{"value":"0.01995","scoring_system":"epss","scoring_elements":"0.83979","published_at":"2026-06-05T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2020-9951"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13543","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13543"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13584","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13584"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9947","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9947"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9948","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9948"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9951","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9951"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9983","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9983"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1817","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1817"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1820","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1820"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1825","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1825"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1826","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1826"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30661","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30661"},{"reference_url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml","reference_id":"","reference_type":"","scores":[{"value":"8.8","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=1901216","reference_id":"1901216","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1901216"},{"reference_url":"https://security.gentoo.org/glsa/202012-10","reference_id":"GLSA-202012-10","reference_type":"","scores":[],"url":"https://security.gentoo.org/glsa/202012-10"},{"reference_url":"https://access.redhat.com/errata/RHSA-2021:1586","reference_id":"RHSA-2021:1586","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2021:1586"},{"reference_url":"https://access.redhat.com/errata/RHSA-2025:10364","reference_id":"RHSA-2025:10364","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2025:10364"},{"reference_url":"https://usn.ubuntu.com/4648-1/","reference_id":"USN-4648-1","reference_type":"","scores":[],"url":"https://usn.ubuntu.com/4648-1/"}],"fixed_packages":[],"aliases":["CVE-2020-9951"],"risk_score":4.0,"exploitability":"0.5","weighted_severity":"7.9","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-u6jb-k4c9-bqdd"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/5367?format=json","vulnerability_id":"VCID-va76-8agd-mfdd","summary":"multiple 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code execution vulnerability exists in the WebSocket functionality of Webkit WebKitGTK 2.30.0. A specially crafted web page can trigger a use-after-free vulnerability which can lead to remote code execution. An attacker can get a user to visit a webpage to trigger this vulnerability.","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-13543.json","reference_id":"","reference_type":"","scores":[{"value":"8.8","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-13543.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2020-13543","reference_id":"","reference_type":"","scores":[{"value":"0.01488","scoring_system":"epss","scoring_elements":"0.81377","published_at":"2026-06-04T12:55:00Z"},{"value":"0.01488","scoring_system":"epss","scoring_elements":"0.81405","published_at":"2026-06-05T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2020-13543"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13543","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13543"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13584","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13584"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9947","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9947"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9948","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9948"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9951","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9951"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9983","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9983"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1817","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1817"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1820","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1820"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1825","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1825"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1826","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1826"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30661","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30661"},{"reference_url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml","reference_id":"","reference_type":"","scores":[{"value":"8.8","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=1903568","reference_id":"1903568","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1903568"},{"reference_url":"https://security.gentoo.org/glsa/202012-10","reference_id":"GLSA-202012-10","reference_type":"","scores":[],"url":"https://security.gentoo.org/glsa/202012-10"},{"reference_url":"https://access.redhat.com/errata/RHSA-2021:1586","reference_id":"RHSA-2021:1586","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2021:1586"},{"reference_url":"https://access.redhat.com/errata/RHSA-2025:10364","reference_id":"RHSA-2025:10364","reference_type":"","scores":[],"url":"https://access.redhat.com/errata/RHSA-2025:10364"}],"fixed_packages":[],"aliases":["CVE-2020-13543"],"risk_score":4.0,"exploitability":"0.5","weighted_severity":"7.9","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-wq9h-edp2-pufb"}],"fixing_vulnerabilities":[],"risk_score":"10.0","resource_url":"http://public2.vulnerablecode.io/packages/pkg:rpm/redhat/webkit2gtk3@2.30.4-1%3Farch=el8"}