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
Vulnerable Libraries - postcss-6.0.23.tgz, postcss-7.0.16.tgz
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: - react-jhipster-0.7.0.tgz (Root Library) - sanitize-html-1.18.2.tgz - :x: **postcss-6.0.23.tgz** (Vulnerable Library)
postcss-7.0.16.tgz
Tool for transforming styles with JS plugins
Library home page: https://registry.npmjs.org/postcss/-/postcss-7.0.16.tgz
Path to dependency file: /package.json
Path to vulnerable library: /node_modules/icss-utils/node_modules/postcss/package.json
Dependency Hierarchy: - autoprefixer-9.5.0.tgz (Root Library) - :x: **postcss-7.0.16.tgz** (Vulnerable Library)
Found in HEAD commit: 3f6d614029f4d6cfdddfcef8468949cb7822503c
Found in base branch: master
Vulnerability 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.
Publish Date: 2023-09-29
URL: CVE-2023-44270
CVSS 3 Score Details (5.3)
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.Suggested Fix
Type: Upgrade version
Origin: https://github.com/advisories/GHSA-7fh5-64p2-3v2j
Release Date: 2023-09-29
Fix Resolution (postcss): 8.4.31
Direct dependency fix Resolution (autoprefixer): 10.0.0
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