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.
CVE-2023-44270 - Medium Severity Vulnerability
postcss-6.0.1.tgz
Tool for transforming styles with JS plugins
Library home page: https://registry.npmjs.org/postcss/-/postcss-6.0.1.tgz
Path to dependency file: /package.json
Path to vulnerable library: /node_modules/postcss/package.json
Dependency Hierarchy: - microbundle-crl-0.13.11.tgz (Root Library) - rollup-plugin-postcss-2.9.0.tgz - postcss-modules-2.0.0.tgz - css-modules-loader-core-1.1.0.tgz - :x: **postcss-6.0.1.tgz** (Vulnerable Library)
postcss-7.0.21.tgz
Tool for transforming styles with JS plugins
Library home page: https://registry.npmjs.org/postcss/-/postcss-7.0.21.tgz
Path to dependency file: /package.json
Path to vulnerable library: /node_modules/postcss/package.json
Dependency Hierarchy: - react-scripts-3.4.4.tgz (Root Library) - resolve-url-loader-3.1.2.tgz - :x: **postcss-7.0.21.tgz** (Vulnerable Library)
postcss-7.0.36.tgz
Tool for transforming styles with JS plugins
Library home page: https://registry.npmjs.org/postcss/-/postcss-7.0.36.tgz
Path to dependency file: /package.json
Path to vulnerable library: /node_modules/postcss/package.json
Dependency Hierarchy: - microbundle-crl-0.13.11.tgz (Root Library) - autoprefixer-9.8.6.tgz - :x: **postcss-7.0.36.tgz** (Vulnerable Library)
postcss-6.0.23.tgz
Tool for transforming styles with JS plugins
Library home page: https://registry.npmjs.org/postcss/-/postcss-6.0.23.tgz
Path to dependency file: /package.json
Path to vulnerable library: /node_modules/postcss/package.json
Dependency Hierarchy: - microbundle-crl-0.13.11.tgz (Root Library) - rollup-plugin-postcss-2.9.0.tgz - postcss-modules-2.0.0.tgz - css-modules-loader-core-1.1.0.tgz - postcss-modules-local-by-default-1.2.0.tgz - :x: **postcss-6.0.23.tgz** (Vulnerable Library)
Found in HEAD commit: aeab869031be23faba5c5de38e09f27a58e99471
Found in base branch: master
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.
Publish Date: 2023-09-29
URL: CVE-2023-44270
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: None - Integrity Impact: Low - Availability Impact: None
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: https://github.com/advisories/GHSA-7fh5-64p2-3v2j
Release Date: 2023-09-29
Fix Resolution: postcss - 8.4.31