{"id":"UBUNTU-CVE-2018-19787","details":"An issue was discovered in lxml before 4.2.5. lxml/html/clean.py in the lxml.html.clean module does not remove javascript: URLs that use escaping, allowing a remote attacker to conduct XSS attacks, as demonstrated by \"j a v a s c r i p t:\" in Internet Explorer. This is a similar issue to CVE-2014-3146.","modified":"2026-01-30T02:31:30.750383Z","published":"2018-12-02T00:00:00Z","related":["USN-3841-1","USN-3841-2"],"upstream":["CVE-2018-19787"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-19787"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3841-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3841-2"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-19787"}],"affected":[{"package":{"name":"lxml","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/lxml@3.3.3-1ubuntu0.2?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.3.3-1ubuntu0.2"}]}],"versions":["3.2.0-1","3.3.0~beta2-1","3.3.0~beta4-1","3.3.1-1","3.3.2-1","3.3.2-1build1","3.3.3-1","3.3.3-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"python-lxml","binary_version":"3.3.3-1ubuntu0.2"},{"binary_name":"python3-lxml","binary_version":"3.3.3-1ubuntu0.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-19787.json"}},{"package":{"name":"lxml","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/lxml@3.5.0-1ubuntu0.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.0-1ubuntu0.1"}]}],"versions":["3.4.4-1","3.5.0-1","3.5.0-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"python-lxml","binary_version":"3.5.0-1ubuntu0.1"},{"binary_name":"python3-lxml","binary_version":"3.5.0-1ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-19787.json"}},{"package":{"name":"lxml","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/lxml@4.2.1-1ubuntu0.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.1-1ubuntu0.1"}]}],"versions":["4.0.0-1","4.1.0-1","4.2.0-1","4.2.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python-lxml","binary_version":"4.2.1-1ubuntu0.1"},{"binary_name":"python3-lxml","binary_version":"4.2.1-1ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-19787.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},{"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"}]}