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This issue has been patched in versions 9.0.892 and 9.1.893-beta.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2026-25543","reference_id":"","reference_type":"","scores":[{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.05852","published_at":"2026-06-11T12:55:00Z"},{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.05862","published_at":"2026-06-14T12:55:00Z"},{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.0587","published_at":"2026-06-13T12:55:00Z"},{"value":"0.0002","scoring_system":"epss","scoring_elements":"0.05878","published_at":"2026-06-12T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-25543"},{"reference_url":"https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/template","reference_id":"","reference_type":"","scores":[{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/template"},{"reference_url":"https://github.com/mganss/HtmlSanitizer","reference_id":"","reference_type":"","scores":[{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/mganss/HtmlSanitizer"},{"reference_url":"https://github.com/mganss/HtmlSanitizer/releases/tag/v9.0.892","reference_id":"","reference_type":"","scores":[{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/mganss/HtmlSanitizer/releases/tag/v9.0.892"},{"reference_url":"https://github.com/mganss/HtmlSanitizer/commit/0ac53dca30ddad963f2b243669a5066933d82b81","reference_id":"0ac53dca30ddad963f2b243669a5066933d82b81","reference_type":"","scores":[{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/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:Y/T:P/P:M/B:A/M:M/D:T/2026-02-05T18:24:02Z/"}],"url":"https://github.com/mganss/HtmlSanitizer/commit/0ac53dca30ddad963f2b243669a5066933d82b81"},{"reference_url":"https://www.nuget.org/packages/HtmlSanitizer/9.0.892","reference_id":"9.0.892","reference_type":"","scores":[{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/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:Y/T:P/P:M/B:A/M:M/D:T/2026-02-05T18:24:02Z/"}],"url":"https://www.nuget.org/packages/HtmlSanitizer/9.0.892"},{"reference_url":"https://www.nuget.org/packages/HtmlSanitizer/9.1.893-beta","reference_id":"9.1.893-beta","reference_type":"","scores":[{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/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:Y/T:P/P:M/B:A/M:M/D:T/2026-02-05T18:24:02Z/"}],"url":"https://www.nuget.org/packages/HtmlSanitizer/9.1.893-beta"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25543","reference_id":"CVE-2026-25543","reference_type":"","scores":[{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/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-2026-25543"},{"reference_url":"https://github.com/advisories/GHSA-j92c-7v7g-gj3f","reference_id":"GHSA-j92c-7v7g-gj3f","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-j92c-7v7g-gj3f"},{"reference_url":"https://github.com/mganss/HtmlSanitizer/security/advisories/GHSA-j92c-7v7g-gj3f","reference_id":"GHSA-j92c-7v7g-gj3f","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"6.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/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:Y/T:P/P:M/B:A/M:M/D:T/2026-02-05T18:24:02Z/"}],"url":"https://github.com/mganss/HtmlSanitizer/security/advisories/GHSA-j92c-7v7g-gj3f"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/38679?format=json","purl":"pkg:nuget/HtmlSanitizer@9.0.892","is_vulnerable":false,"affec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is a .NET library for cleaning HTML fragments and documents from constructs that can lead to XSS attacks. The vulnerability occurs in configurations where foreign content is allowed, i.e. either `svg` or `math` are in the list of allowed elements. In the case an application sanitizes user input with a vulnerable configuration, an attacker could bypass the sanitization and inject arbitrary HTML, including JavaScript code. Note that in the default configuration the vulnerability is not present. The vulnerability has been fixed in versions 8.0.723 and 8.1.722-beta (preview version).","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2023-44390","reference_id":"","reference_type":"","scores":[{"value":"0.00161","scoring_system":"epss","scoring_elements":"0.37022","published_at":"2026-06-13T12:55:00Z"},{"value":"0.00161","scoring_system":"epss","scoring_elements":"0.37008","published_at":"2026-06-14T12:55:00Z"},{"value":"0.00161","scoring_system":"epss","scoring_elements":"0.36994","published_at":"2026-06-12T12:55:00Z"},{"value":"0.00161","scoring_system":"epss","scoring_elements":"0.36816","published_at":"2026-06-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2023-44390"},{"reference_url":"https://github.com/mganss/HtmlSanitizer","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":"generic_textual","scoring_elements":""}],"url":"https://github.com/mganss/HtmlSanitizer"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2023-44390","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":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-44390"},{"reference_url":"https://github.com/mganss/HtmlSanitizer/commit/ab29319866c020f0cc11e6b92228cd8039196c6e","reference_id":"ab29319866c020f0cc11e6b92228cd8039196c6e","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":"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/2024-09-19T17:31:53Z/"}],"url":"https://github.com/mganss/HtmlSanitizer/commit/ab29319866c020f0cc11e6b92228cd8039196c6e"},{"reference_url":"https://github.com/advisories/GHSA-43cp-6p3q-2pc4","reference_id":"GHSA-43cp-6p3q-2pc4","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-43cp-6p3q-2pc4"},{"reference_url":"https://github.com/mganss/HtmlSanitizer/security/advisories/GHSA-43cp-6p3q-2pc4","reference_id":"GHSA-43cp-6p3q-2pc4","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":"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/2024-09-19T17:31:53Z/"}],"url":"https://github.com/mganss/HtmlSanitizer/security/advisories/GHSA-43cp-6p3q-2pc4"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/379112?format=json","purl":"pkg:nuget/HtmlSanitizer@8.0.723","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-qug5-aa3t-x7fe"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/HtmlSanitizer@8.0.723"},{"url":"http://public2.vulnerablecode.io/api/packages/379113?format=json","purl":"pkg:nuget/HtmlSanitizer@8.1.722-beta","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-qug5-aa3t-x7fe"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/HtmlSanitizer@8.1.722-beta"}],"aliases":["CVE-2023-44390","GHSA-43cp-6p3q-2pc4"],"risk_score":3.1,"exploitability":"0.5","weighted_severity":"6.2","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-sk8h-x1x2-2bb1"}],"risk_score":"3.1","resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/HtmlSanitizer@8.1.722-beta"}