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
Tool for transforming styles with JS plugins
Library home page: https://registry.npmjs.org/postcss/-/postcss-8.3.11.tgz
Path to dependency file: /frontend/root-config/package.json
Path to vulnerable library: /frontend/root-config/package.json
Dependency Hierarchy: - webpack-config-single-spa-react-4.0.2.tgz (Root Library) - webpack-config-single-spa-5.1.1.tgz - css-loader-5.2.7.tgz - :x: **postcss-8.3.11.tgz** (Vulnerable Library)
Found in base branch: dev
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://www.cve.org/CVERecord?id=CVE-2023-44270
Release Date: 2023-09-29
Fix Resolution: postcss - 8.4.31
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