{"id":"UBUNTU-CVE-2021-33391","details":"An issue in HTACG HTML Tidy v5.7.28 allows attacker to execute arbitrary code via the -g option of the CleanNode() function in gdoc.c.","modified":"2026-04-22T12:53:56.808627Z","published":"2023-02-17T18:15:00Z","related":["USN-6483-1"],"upstream":["CVE-2021-33391"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-33391"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6483-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-33391"}],"affected":[{"package":{"name":"tidy-html5","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/tidy-html5@1:5.2.0-2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:5.2.0-2"],"ecosystem_specific":{"binaries":[{"binary_version":"1:5.2.0-2","binary_name":"libtidy5"},{"binary_name":"tidy","binary_version":"1:5.2.0-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33391.json"}},{"package":{"name":"tidy-html5","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/tidy-html5@2:5.6.0-11ubuntu0.20.04.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:5.6.0-11ubuntu0.20.04.1"}]}],"versions":["2:5.6.0-10","2:5.6.0-11"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libtidy5deb1","binary_version":"2:5.6.0-11ubuntu0.20.04.1"},{"binary_name":"tidy","binary_version":"2:5.6.0-11ubuntu0.20.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33391.json"}},{"package":{"name":"tidy-html5","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/tidy-html5@2:5.6.0-11ubuntu0.22.04.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:5.6.0-11ubuntu0.22.04.1"}]}],"versions":["2:5.6.0-11build1","2:5.6.0-11build2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libtidy5deb1","binary_version":"2:5.6.0-11ubuntu0.22.04.1"},{"binary_name":"tidy","binary_version":"2:5.6.0-11ubuntu0.22.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33391.json"}},{"package":{"name":"tidy-html5","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/tidy-html5@2:5.6.0-11ubuntu1?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:5.6.0-11ubuntu1"}]}],"versions":["2:5.6.0-11build2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libtidy5deb1","binary_version":"2:5.6.0-11ubuntu1"},{"binary_name":"tidy","binary_version":"2:5.6.0-11ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33391.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}