Vulnerability Instance
Lookup for vulnerabilities affecting packages.
GET /api/vulnerabilities/63215?format=api
{ "url": "http://public2.vulnerablecode.io/api/vulnerabilities/63215?format=api", "vulnerability_id": "VCID-184j-aaaw-pbed", "summary": "If a domain name contained a RTL character, it would cause the domain to be rendered to the right of the path. This could lead to user confusion and spoofing attacks. *This bug only affects Firefox for Android. Other operating systems are unaffected.**Note*: Due to a clerical error this advisory was not included in the original announcement, and was added in February 2022.", "aliases": [ { "alias": "CVE-2021-4221" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/582227?format=api", "purl": "pkg:deb/debian/firefox@0?distro=sid", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/firefox@0%3Fdistro=sid" }, { "url": "http://public2.vulnerablecode.io/api/packages/582059?format=api", "purl": "pkg:deb/debian/firefox@149.0-1?distro=sid", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/firefox@149.0-1%3Fdistro=sid" }, { "url": "http://public2.vulnerablecode.io/api/packages/1059611?format=api", "purl": "pkg:deb/debian/firefox@149.0.2-1?distro=sid", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/firefox@149.0.2-1%3Fdistro=sid" }, { "url": "http://public2.vulnerablecode.io/api/packages/1076056?format=api", "purl": "pkg:deb/debian/firefox@150.0-1?distro=sid", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/firefox@150.0-1%3Fdistro=sid" }, { "url": "http://public2.vulnerablecode.io/api/packages/1088670?format=api", "purl": "pkg:deb/debian/firefox@150.0.1-1?distro=sid", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/firefox@150.0.1-1%3Fdistro=sid" } ], "affected_packages": [], "references": [ { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2021-4221", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00182", "scoring_system": "epss", "scoring_elements": "0.39623", "published_at": "2026-04-29T12:55:00Z" }, { "value": "0.00182", "scoring_system": "epss", "scoring_elements": "0.3984", "published_at": "2026-04-01T12:55:00Z" }, { "value": "0.00182", "scoring_system": "epss", "scoring_elements": "0.39986", "published_at": "2026-04-02T12:55:00Z" }, { "value": "0.00182", "scoring_system": "epss", "scoring_elements": "0.40006", "published_at": "2026-04-16T12:55:00Z" }, { "value": "0.00182", "scoring_system": "epss", "scoring_elements": "0.39977", "published_at": "2026-04-18T12:55:00Z" }, { "value": "0.00182", "scoring_system": "epss", "scoring_elements": "0.39897", "published_at": "2026-04-21T12:55:00Z" }, { "value": "0.00182", "scoring_system": "epss", "scoring_elements": "0.39724", "published_at": "2026-04-24T12:55:00Z" }, { "value": "0.00182", "scoring_system": "epss", "scoring_elements": "0.39709", "published_at": "2026-04-26T12:55:00Z" }, { "value": "0.00182", "scoring_system": "epss", "scoring_elements": "0.40014", "published_at": "2026-04-04T12:55:00Z" }, { "value": "0.00182", "scoring_system": "epss", "scoring_elements": "0.39934", "published_at": "2026-04-07T12:55:00Z" }, { "value": "0.00182", "scoring_system": "epss", "scoring_elements": "0.39988", "published_at": "2026-04-08T12:55:00Z" }, { "value": "0.00182", "scoring_system": "epss", "scoring_elements": "0.40001", "published_at": "2026-04-09T12:55:00Z" }, { "value": "0.00182", "scoring_system": "epss", "scoring_elements": "0.40011", "published_at": "2026-04-11T12:55:00Z" }, { "value": "0.00182", "scoring_system": "epss", "scoring_elements": "0.39975", "published_at": "2026-04-12T12:55:00Z" }, { "value": "0.00182", "scoring_system": "epss", "scoring_elements": "0.39956", "published_at": "2026-04-13T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-4221" }, { "reference_url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-38", "reference_id": "mfsa2021-38", "reference_type": "", "scores": [ { "value": "high", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-38" }, { "reference_url": "https://www.mozilla.org/security/advisories/mfsa2021-38/", "reference_id": "mfsa2021-38", "reference_type": "", "scores": [ { "value": "4.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-16T15:48:58Z/" } ], "url": "https://www.mozilla.org/security/advisories/mfsa2021-38/" }, { "reference_url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1704422", "reference_id": "show_bug.cgi?id=1704422", "reference_type": "", "scores": [ { "value": "4.3", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-16T15:48:58Z/" } ], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1704422" } ], "weaknesses": [], "exploits": [], "severity_range_score": "4.3 - 8.9", "exploitability": null, "weighted_severity": null, "risk_score": null, "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-184j-aaaw-pbed" }