{"id":"UBUNTU-CVE-2023-44270","details":"An issue was discovered in PostCSS before 8.4.31. The vulnerability affects linters using PostCSS to parse external untrusted CSS. An attacker can prepare CSS in such a way that it will contains parts parsed by PostCSS as a CSS comment. After processing by PostCSS, it will be included in the PostCSS output in CSS nodes (rules, properties) despite being included in a comment.","modified":"2026-05-20T16:13:51.181399972Z","published":"2023-09-29T22:15:00Z","upstream":["CVE-2023-44270"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-44270"},{"type":"REPORT","url":"https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5"},{"type":"REPORT","url":"https://github.com/postcss/postcss/blob/main/lib/tokenize.js#L25"},{"type":"REPORT","url":"https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5"},{"type":"REPORT","url":"https://github.com/postcss/postcss/releases/tag/8.4.31"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-44270"}],"affected":[{"package":{"name":"node-postcss","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/node-postcss?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.23-1","6.0.23-3"],"ecosystem_specific":{"binaries":[{"binary_name":"node-postcss","binary_version":"6.0.23-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-44270.json"}},{"package":{"name":"node-postcss","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/node-postcss?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.2.1+~cs5.3.23-8","8.4.5+~cs7.1.51-2","8.4.6+~cs7.3.21-1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-postcss","binary_version":"8.4.6+~cs7.3.21-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-44270.json"}},{"package":{"name":"node-postcss","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/node-postcss?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.4.20+~cs8.0.23-1","8.4.31+~cs8.0.26-1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-postcss","binary_version":"8.4.31+~cs8.0.26-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-44270.json"}},{"package":{"name":"node-postcss","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/node-postcss?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.4.49+~cs9.2.32-1","8.5.6+~cs9.3.28-1"],"ecosystem_specific":{"binaries":[{"binary_version":"8.5.6+~cs9.3.28-1","binary_name":"node-postcss"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-44270.json"}},{"package":{"name":"node-postcss","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/node-postcss?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.5.6+~cs9.3.28-1","8.5.8+~cs9.3.30-1"],"ecosystem_specific":{"binaries":[{"binary_version":"8.5.8+~cs9.3.30-1","binary_name":"node-postcss"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-44270.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:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}