Package Instance
Lookup for vulnerable packages by Package URL.
GET /api/packages/456972?format=api
{ "url": "http://public2.vulnerablecode.io/api/packages/456972?format=api", "purl": "pkg:apk/alpine/py3-lxml@4.6.3-r0?arch=s390x&distroversion=v3.20&reponame=main", "type": "apk", "namespace": "alpine", "name": "py3-lxml", "version": "4.6.3-r0", "qualifiers": { "arch": "s390x", "distroversion": "v3.20", "reponame": "main" }, "subpath": "", "is_vulnerable": false, "next_non_vulnerable_version": "4.6.5-r0", "latest_non_vulnerable_version": "4.9.2-r0", "affected_by_vulnerabilities": [], "fixing_vulnerabilities": [ { "url": "http://public2.vulnerablecode.io/api/vulnerabilities/6296?format=api", "vulnerability_id": "VCID-u7xg-3dp7-vkc2", "summary": "An XSS vulnerability was discovered in python-lxml's clean module versions before 4.6.3. When disabling the safe_attrs_only and forms arguments, the Cleaner class does not remove the formaction attribute allowing for JS to bypass the sanitizer. A remote attacker could exploit this flaw to run arbitrary JS code on users who interact with incorrectly sanitized HTML. This issue is patched in lxml 4.6.3.", "references": [ { "reference_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-28957.json", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" } ], "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-28957.json" }, { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2021-28957", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00518", "scoring_system": "epss", "scoring_elements": "0.66768", "published_at": "2026-04-16T12:55:00Z" }, { "value": "0.00518", "scoring_system": "epss", "scoring_elements": "0.66735", "published_at": "2026-04-13T12:55:00Z" }, { "value": "0.00518", "scoring_system": "epss", "scoring_elements": "0.66764", "published_at": "2026-04-12T12:55:00Z" }, { "value": "0.00518", "scoring_system": "epss", "scoring_elements": "0.66777", "published_at": "2026-04-11T12:55:00Z" }, { "value": "0.00518", "scoring_system": "epss", "scoring_elements": "0.66695", "published_at": "2026-04-02T12:55:00Z" }, { "value": "0.00518", "scoring_system": "epss", "scoring_elements": "0.66757", "published_at": "2026-04-09T12:55:00Z" }, { "value": "0.00518", "scoring_system": "epss", "scoring_elements": "0.66742", "published_at": "2026-04-08T12:55:00Z" }, { "value": "0.00518", "scoring_system": "epss", "scoring_elements": "0.66693", "published_at": "2026-04-07T12:55:00Z" }, { "value": "0.00518", "scoring_system": "epss", "scoring_elements": "0.66721", "published_at": "2026-04-04T12:55:00Z" }, { "value": "0.00518", "scoring_system": "epss", "scoring_elements": "0.66655", "published_at": "2026-04-01T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-28957" }, { "reference_url": "https://bugs.launchpad.net/lxml/+bug/1888153", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-17T21:31:40Z/" } ], "url": "https://bugs.launchpad.net/lxml/+bug/1888153" }, { "reference_url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28957", "reference_id": "", "reference_type": "", "scores": [], "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28957" }, { "reference_url": "https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" } ], "url": "https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml" }, { "reference_url": "https://github.com/advisories/GHSA-jq4v-f5q6-mjqq", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "MODERATE", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-jq4v-f5q6-mjqq" }, { "reference_url": "https://github.com/lxml/lxml", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/lxml/lxml" }, { "reference_url": "https://github.com/lxml/lxml/commit/2d01a1ba8984e0483ce6619b972832377f208a0d", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/lxml/lxml/commit/2d01a1ba8984e0483ce6619b972832377f208a0d" }, { "reference_url": "https://github.com/lxml/lxml/commit/a5f9cb52079dc57477c460dbe6ba0f775e14a999", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-17T21:31:40Z/" } ], "url": "https://github.com/lxml/lxml/commit/a5f9cb52079dc57477c460dbe6ba0f775e14a999" }, { "reference_url": "https://github.com/lxml/lxml/pull/316", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/lxml/lxml/pull/316" }, { "reference_url": "https://github.com/lxml/lxml/pull/316/commits/10ec1b4e9f93713513a3264ed6158af22492f270", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-17T21:31:40Z/" } ], "url": "https://github.com/lxml/lxml/pull/316/commits/10ec1b4e9f93713513a3264ed6158af22492f270" }, { "reference_url": "https://github.com/pypa/advisory-database/tree/main/vulns/lxml/PYSEC-2021-19.yaml", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/pypa/advisory-database/tree/main/vulns/lxml/PYSEC-2021-19.yaml" }, { "reference_url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00031.html", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-17T21:31:40Z/" } ], "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00031.html" }, { "reference_url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3C2R44VDUY7FJVMAVRZ2WY7XYL4SVN45", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3C2R44VDUY7FJVMAVRZ2WY7XYL4SVN45" }, { "reference_url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XXN3QPWCTQVOGW4BMWV3AUUZZ4NRZNSQ", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XXN3QPWCTQVOGW4BMWV3AUUZZ4NRZNSQ" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-28957", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-28957" }, { "reference_url": "https://pypi.org/project/lxml", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://pypi.org/project/lxml" }, { "reference_url": "https://security.gentoo.org/glsa/202208-06", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-17T21:31:40Z/" } ], "url": "https://security.gentoo.org/glsa/202208-06" }, { "reference_url": "https://security.netapp.com/advisory/ntap-20210521-0004", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://security.netapp.com/advisory/ntap-20210521-0004" }, { "reference_url": "https://www.debian.org/security/2021/dsa-4880", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-17T21:31:40Z/" } ], "url": "https://www.debian.org/security/2021/dsa-4880" }, { "reference_url": "https://www.oracle.com/security-alerts/cpuoct2021.html", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "5.3", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-17T21:31:40Z/" } ], "url": "https://www.oracle.com/security-alerts/cpuoct2021.html" }, { "reference_url": "https://bugzilla.redhat.com/show_bug.cgi?id=1941534", "reference_id": "1941534", "reference_type": "", "scores": [], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1941534" }, { "reference_url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3C2R44VDUY7FJVMAVRZ2WY7XYL4SVN45/", "reference_id": "3C2R44VDUY7FJVMAVRZ2WY7XYL4SVN45", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-17T21:31:40Z/" } ], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3C2R44VDUY7FJVMAVRZ2WY7XYL4SVN45/" }, { "reference_url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=985643", "reference_id": "985643", "reference_type": "", "scores": [], "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=985643" }, { "reference_url": "https://security.archlinux.org/AVG-1720", "reference_id": "AVG-1720", "reference_type": "", "scores": [ { "value": "Medium", "scoring_system": "archlinux", "scoring_elements": "" } ], "url": "https://security.archlinux.org/AVG-1720" }, { "reference_url": "https://security.netapp.com/advisory/ntap-20210521-0004/", "reference_id": "ntap-20210521-0004", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-17T21:31:40Z/" } ], "url": "https://security.netapp.com/advisory/ntap-20210521-0004/" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2021:4151", "reference_id": "RHSA-2021:4151", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2021:4151" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2021:4158", "reference_id": "RHSA-2021:4158", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2021:4158" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2021:4160", "reference_id": "RHSA-2021:4160", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2021:4160" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2021:4162", "reference_id": "RHSA-2021:4162", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2021:4162" }, { "reference_url": "https://usn.ubuntu.com/4896-1/", "reference_id": "USN-4896-1", "reference_type": "", "scores": [], "url": "https://usn.ubuntu.com/4896-1/" }, { "reference_url": "https://usn.ubuntu.com/4896-2/", "reference_id": "USN-4896-2", "reference_type": "", "scores": [], "url": "https://usn.ubuntu.com/4896-2/" }, { "reference_url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XXN3QPWCTQVOGW4BMWV3AUUZZ4NRZNSQ/", "reference_id": "XXN3QPWCTQVOGW4BMWV3AUUZZ4NRZNSQ", "reference_type": "", "scores": [ { "value": "6.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-12-17T21:31:40Z/" } ], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XXN3QPWCTQVOGW4BMWV3AUUZZ4NRZNSQ/" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/456972?format=api", "purl": "pkg:apk/alpine/py3-lxml@4.6.3-r0?arch=s390x&distroversion=v3.20&reponame=main", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/py3-lxml@4.6.3-r0%3Farch=s390x&distroversion=v3.20&reponame=main" } ], "aliases": [ "CVE-2021-28957", "GHSA-jq4v-f5q6-mjqq", "PYSEC-2021-19" ], "risk_score": 3.1, "exploitability": "0.5", "weighted_severity": "6.2", "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-u7xg-3dp7-vkc2" } ], "risk_score": null, "resource_url": "http://public2.vulnerablecode.io/packages/pkg:apk/alpine/py3-lxml@4.6.3-r0%3Farch=s390x&distroversion=v3.20&reponame=main" }