{"id":"UBUNTU-CVE-2021-35043","details":"OWASP AntiSamy before 1.6.4 allows XSS via HTML attributes when using the HTML output serializer (XHTML is not affected). This was demonstrated by a javascript: URL with &#00058 as the replacement for the : character.","modified":"2026-05-20T16:06:28.117393018Z","published":"2021-07-19T15:15:00Z","upstream":["CVE-2021-35043"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-35043"},{"type":"REPORT","url":"https://github.com/nahsra/antisamy/pull/87"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-35043"}],"affected":[{"package":{"name":"libowasp-antisamy-java","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libowasp-antisamy-java?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.3+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libowasp-antisamy-java","binary_version":"1.5.3+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-35043.json"}},{"package":{"name":"libowasp-antisamy-java","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libowasp-antisamy-java?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.3+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libowasp-antisamy-java","binary_version":"1.5.3+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-35043.json"}},{"package":{"name":"libowasp-antisamy-java","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libowasp-antisamy-java?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.3+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libowasp-antisamy-java","binary_version":"1.5.3+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-35043.json"}},{"package":{"name":"libowasp-antisamy-java","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libowasp-antisamy-java?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.3+dfsg-1.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libowasp-antisamy-java","binary_version":"1.5.3+dfsg-1.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-35043.json"}},{"package":{"name":"libowasp-antisamy-java","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libowasp-antisamy-java?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.3+dfsg-1.1","1.7.4-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.7.4-1","binary_name":"libowasp-antisamy-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-35043.json"}},{"package":{"name":"libowasp-antisamy-java","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libowasp-antisamy-java?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.7.4-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libowasp-antisamy-java","binary_version":"1.7.4-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-35043.json"}},{"package":{"name":"libowasp-antisamy-java","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libowasp-antisamy-java?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.7.4-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libowasp-antisamy-java","binary_version":"1.7.4-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-35043.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}