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-5.2.18.tgz, postcss-6.0.1.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
Dependency Hierarchy: - postcss-nested-3.0.0.tgz (Root Library) - :x: **postcss-6.0.23.tgz** (Vulnerable Library)
postcss-5.2.18.tgz
Tool for transforming styles with JS plugins
Library home page: https://registry.npmjs.org/postcss/-/postcss-5.2.18.tgz
Path to dependency file: /package.json
Path to vulnerable library: /node_modules/postcss
Dependency Hierarchy: - rollup-plugin-postcss-1.6.2.tgz (Root Library) - cssnano-3.10.0.tgz - :x: **postcss-5.2.18.tgz** (Vulnerable Library)
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
Dependency Hierarchy: - rollup-plugin-postcss-1.6.2.tgz (Root Library) - postcss-modules-1.1.0.tgz - css-modules-loader-core-1.1.0.tgz - :x: **postcss-6.0.1.tgz** (Vulnerable Library)
Found in HEAD commit: 8442716a2567dd4d8cfb426df6ecf4129181aacc
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 (postcss-nested): 5.0.0
Fix Resolution (postcss): 8.4.31
Direct dependency fix Resolution (rollup-plugin-postcss): 4.0.1
Fix Resolution (postcss): 8.4.31
Direct dependency fix Resolution (rollup-plugin-postcss): 4.0.1