{"id":"UBUNTU-CVE-2021-32821","details":"MooTools is a collection of JavaScript utilities for JavaScript developers. All known versions include a CSS selector parser that is vulnerable to Regular Expression Denial of Service (ReDoS). An attack requires that an attacker can inject a string into a CSS selector at runtime, which is quite common with e.g. jQuery CSS selectors. No patches are available for this issue.","modified":"2026-05-20T16:06:25.396254837Z","published":"2023-01-03T17:15:00Z","upstream":["CVE-2021-32821"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-32821"},{"type":"REPORT","url":"https://securitylab.github.com/advisories/GHSL-2020-345-redos-mootools/"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-32821"}],"affected":[{"package":{"name":"mootools","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/mootools?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.5~debian1-2.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-mootools","binary_version":"1.4.5~debian1-2.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32821.json"}},{"package":{"name":"mootools","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mootools?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.5~debian1-2.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-mootools","binary_version":"1.4.5~debian1-2.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32821.json"}},{"package":{"name":"mootools","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/mootools?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.5~debian1-2.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-mootools","binary_version":"1.4.5~debian1-2.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32821.json"}},{"package":{"name":"mootools","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/mootools?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.5~debian1-3"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-mootools","binary_version":"1.4.5~debian1-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32821.json"}},{"package":{"name":"mootools","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/mootools?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.5~debian1-3"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.5~debian1-3","binary_name":"libjs-mootools"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32821.json"}},{"package":{"name":"mootools","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/mootools?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.5~debian1-3"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-mootools","binary_version":"1.4.5~debian1-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32821.json"}},{"package":{"name":"mootools","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/mootools?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.5~debian1-3","1.4.5~debian1-3build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.5~debian1-3build1","binary_name":"libjs-mootools"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32821.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}