{"url":"http://public2.vulnerablecode.io/api/packages/237153?format=json","purl":"pkg:composer/typo3/cms-backend@9.5.9","type":"composer","namespace":"typo3","name":"cms-backend","version":"9.5.9","qualifiers":{},"subpath":"","is_vulnerable":true,"next_non_vulnerable_version":"9.5.25","latest_non_vulnerable_version":"14.3.0","affected_by_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/42359?format=json","vulnerability_id":"VCID-t3jn-vwbx-u7cr","summary":"Cross-Site Scripting in Content Preview (CType menu)\n### Problem\nIt has been discovered that content elements of type _menu_ are vulnerable to cross-site scripting when their referenced items get previewed in the page module. A valid backend user account is needed to exploit this vulnerability.\n\n### Solution\nUpdate to TYPO3 versions 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 that fix the problem described.\n\n### Credits\nThanks to TYPO3 contributor Oliver Bartsch who reported and fixed the issue.\n\n### References\n* [TYPO3-CORE-SA-2021-008](https://typo3.org/security/advisory/typo3-core-sa-2021-008)","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2021-21370","reference_id":"","reference_type":"","scores":[{"value":"0.00342","scoring_system":"epss","scoring_elements":"0.56873","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00342","scoring_system":"epss","scoring_elements":"0.56836","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00342","scoring_system":"epss","scoring_elements":"0.56852","published_at":"2026-04-26T12:55:00Z"},{"value":"0.00342","scoring_system":"epss","scoring_elements":"0.56835","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00342","scoring_system":"epss","scoring_elements":"0.56917","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00342","scoring_system":"epss","scoring_elements":"0.56921","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00342","scoring_system":"epss","scoring_elements":"0.56891","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00342","scoring_system":"epss","scoring_elements":"0.56914","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00342","scoring_system":"epss","scoring_elements":"0.56935","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00342","scoring_system":"epss","scoring_elements":"0.56926","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00342","scoring_system":"epss","scoring_elements":"0.56922","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00342","scoring_system":"epss","scoring_elements":"0.56871","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00342","scoring_system":"epss","scoring_elements":"0.56779","published_at":"2026-04-01T12:55:00Z"},{"value":"0.00342","scoring_system":"epss","scoring_elements":"0.56895","published_at":"2026-04-21T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2021-21370"},{"reference_url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-21370.yaml","reference_id":"","reference_type":"","scores":[{"value":"5.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-21370.yaml"},{"reference_url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-21370.yaml","reference_id":"","reference_type":"","scores":[{"value":"5.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-21370.yaml"},{"reference_url":"https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-x7hc-x7fm-f7qh","reference_id":"","reference_type":"","scores":[{"value":"5.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-x7hc-x7fm-f7qh"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21370","reference_id":"","reference_type":"","scores":[{"value":"5.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-21370"},{"reference_url":"https://packagist.org/packages/typo3/cms-backend","reference_id":"","reference_type":"","scores":[{"value":"5.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://packagist.org/packages/typo3/cms-backend"},{"reference_url":"https://typo3.org/security/advisory/typo3-core-sa-2021-008","reference_id":"","reference_type":"","scores":[{"value":"5.4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://typo3.org/security/advisory/typo3-core-sa-2021-008"},{"reference_url":"https://github.com/advisories/GHSA-x7hc-x7fm-f7qh","reference_id":"GHSA-x7hc-x7fm-f7qh","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-x7hc-x7fm-f7qh"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/76049?format=json","purl":"pkg:composer/typo3/cms-backend@9.5.25","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:composer/typo3/cms-backend@9.5.25"},{"url":"http://public2.vulnerablecode.io/api/packages/75911?format=json","purl":"pkg:co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