{"id":"USN-6483-1","summary":"tidy-html5 vulnerability","details":"Neeraj Pal discovered that HTML Tidy incorrectly handled parsing certain\nHTML data. If a user or automated system were tricked into parsing\nspecially crafted HTML data, a remote attacker could cause HTML Tidy to\nconsume resources, leading to a denial of service, or possibly execute\narbitrary code.\n","modified":"2026-04-27T16:57:17.212373Z","published":"2023-11-15T14:31:49Z","related":["UBUNTU-CVE-2021-33391"],"upstream":["CVE-2021-33391","UBUNTU-CVE-2021-33391"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6483-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-33391"}],"affected":[{"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":{"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"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6483-1.json","cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"id":"CVE-2021-33391","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"}]}]}}},{"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":{"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"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6483-1.json","cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"id":"CVE-2021-33391","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"}]}]}}}],"schema_version":"1.7.5"}