{"url":"http://public2.vulnerablecode.io/api/packages/25869?format=json","purl":"pkg:pypi/vtk@0","type":"pypi","namespace":"","name":"vtk","version":"0","qualifiers":{},"subpath":"","is_vulnerable":true,"next_non_vulnerable_version":"9.5.1","latest_non_vulnerable_version":"9.5.1","affected_by_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/208836?format=json","vulnerability_id":"VCID-ht5q-p914-tbef","summary":"There is a NULL pointer dereference vulnerability in VTK before 9.2.5, and it lies in IO/Infovis/vtkXMLTreeReader.cxx. The vendor didn't check the return value of libxml2 API 'xmlDocGetRootElement', and try to dereference it. It is unsafe as the return value can be NULL and that NULL pointer dereference may crash the application.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2021-42521","reference_id":"","reference_type":"","scores":[{"value":"0.00483","scoring_system":"epss","scoring_elements":"0.65695","published_at":"2026-06-11T12:55:00Z"},{"value":"0.00483","scoring_system":"epss","scoring_elements":"0.65793","published_at":"2026-06-12T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2021-42521"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42521","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42521"},{"reference_url":"https://discourse.vtk.org/t/vtk-9-2-5-is-out/10549","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://discourse.vtk.org/t/vtk-9-2-5-is-out/10549"},{"reference_url":"https://github.com/pypa/advisory-database/tree/main/vulns/vtk/PYSEC-2022-255.yaml","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pypa/advisory-database/tree/main/vulns/vtk/PYSEC-2022-255.yaml"},{"reference_url":"https://gitlab.kitware.com/vtk/vtk","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://gitlab.kitware.com/vtk/vtk"},{"reference_url":"https://gitlab.kitware.com/vtk/vtk/issues/17818","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://gitlab.kitware.com/vtk/vtk/issues/17818"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PCTMSAAVP4BW2HTZLDWMGKZ2WEC5OFLK","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PCTMSAAVP4BW2HTZLDWMGKZ2WEC5OFLK"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1031877","reference_id":"1031877","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1031877"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1034843","reference_id":"1034843","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1034843"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1034844","reference_id":"1034844","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1034844"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42521","reference_id":"CVE-2021-42521","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"8.7","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42521"},{"reference_url":"https://github.com/advisories/GHSA-xfhg-9pjg-xg7g","reference_id":"GHSA-xfhg-9pjg-xg7g","reference_type":"","scores":[{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-xfhg-9pjg-xg7g"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/25870?format=json","purl":"pkg:pypi/vtk@9.0.1","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-6t4a-px91-jkcz"},{"vulnerability":"VCID-83yk-enu2-w7f8"},{"vulnerability":"VCID-8ed5-jjfg-xfbw"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/vtk@9.0.1"}],"aliases":["CVE-2021-42521","GHSA-xfhg-9pjg-xg7g","PYSEC-2022-255"],"risk_score":4.0,"exploitability":"0.5","weighted_severity":"8.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-ht5q-p914-tbef"}],"fixing_vulnerabilities":[],"risk_score":"4.0","resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/vtk@0"}