## CVE-2021-23368 - Medium Severity Vulnerability

Vulnerable Libraries - postcss-7.0.32.tgz, postcss-7.0.35.tgz

postcss-7.0.32.tgz

Tool for transforming styles with JS plugins

Library home page: https://registry.npmjs.org/postcss/-/postcss-7.0.32.tgz

Path to dependency file: atanas.info/package.json

Path to vulnerable library: atanas.info/node_modules/purgecss/node_modules/postcss/package.json

Dependency Hierarchy: - parcel-bundler-1.12.5.tgz (Root Library) - htmlnano-0.2.9.tgz - purgecss-2.3.0.tgz - :x: **postcss-7.0.32.tgz** (Vulnerable Library)

postcss-7.0.35.tgz

Tool for transforming styles with JS plugins

Library home page: https://registry.npmjs.org/postcss/-/postcss-7.0.35.tgz

Path to dependency file: atanas.info/package.json

Path to vulnerable library: atanas.info/node_modules/postcss-normalize-positions/node_modules/postcss/package.json,atanas.info/node_modules/icss-utils/node_modules/postcss/package.json,atanas.info/node_modules/stylehacks/node_modules/postcss/package.json,atanas.info/node_modules/cssnano-preset-default/node_modules/postcss/package.json,atanas.info/node_modules/postcss-minify-gradients/node_modules/postcss/package.json,atanas.info/node_modules/postcss-normalize-url/node_modules/postcss/package.json,atanas.info/node_modules/postcss-nesting/node_modules/postcss/package.json,atanas.info/node_modules/css-blank-pseudo/node_modules/postcss/package.json,atanas.info/node_modules/postcss-color-hex-alpha/node_modules/postcss/package.json,atanas.info/node_modules/postcss-browser-comments/node_modules/postcss/package.json,atanas.info/node_modules/postcss-color-gray/node_modules/postcss/package.json,atanas.info/node_modules/postcss-ordered-values/node_modules/postcss/package.json,atanas.info/node_modules/postcss-custom-properties/node_modules/postcss/package.json,atanas.info/node_modules/cssnano-util-raw-cache/node_modules/postcss/package.json,atanas.info/node_modules/postcss-safe-parser/node_modules/postcss/package.json,atanas.info/node_modules/postcss-svgo/node_modules/postcss/package.json,atanas.info/node_modules/css-prefers-color-scheme/node_modules/postcss/package.json,atanas.info/node_modules/postcss-color-functional-notation/node_modules/postcss/package.json,atanas.info/node_modules/postcss-font-variant/node_modules/postcss/package.json,atanas.info/node_modules/postcss-minify-selectors/node_modules/postcss/package.json,atanas.info/node_modules/postcss-focus-within/node_modules/postcss/package.json,atanas.info/node_modules/postcss-reduce-transforms/node_modules/postcss/package.json,atanas.info/node_modules/postcss-normalize/node_modules/postcss/package.json,atanas.info/node_modules/postcss-colormin/node_modules/postcss/package.json,atanas.info/node_modules/postcss-media-minmax/node_modules/postcss/package.json,atanas.info/node_modules/uncss/node_modules/postcss/package.json,atanas.info/node_modules/postcss-minify-params/node_modules/postcss/package.json,atanas.info/node_modules/postcss-merge-longhand/node_modules/postcss/package.json,atanas.info/node_modules/postcss-utilities/node_modules/postcss/package.json,atanas.info/node_modules/postcss-convert-values/node_modules/postcss/package.json,atanas.info/node_modules/@vuepress/core/node_modules/postcss/package.json,atanas.info/node_modules/postcss-attribute-case-insensitive/node_modules/postcss/package.json,atanas.info/node_modules/postcss-discard-duplicates/node_modules/postcss/package.json,atanas.info/node_modules/postcss-logical/node_modules/postcss/package.json,atanas.info/node_modules/postcss-preset-env/node_modules/postcss/package.json,atanas.info/node_modules/postcss-normalize-timing-functions/node_modules/postcss/package.json,atanas.info/node_modules/postcss-color-rebeccapurple/node_modules/postcss/package.json,atanas.info/node_modules/postcss-normalize-unicode/node_modules/postcss/package.json,atanas.info/node_modules/postcss-initial/node_modules/postcss/package.json,atanas.info/node_modules/postcss-double-position-gradients/node_modules/postcss/package.json,atanas.info/node_modules/@vue/component-compiler-utils/node_modules/postcss/package.json,atanas.info/node_modules/postcss-simple-vars/node_modules/postcss/package.json,atanas.info/node_modules/postcss-normalize-repeat-style/node_modules/postcss/package.json,atanas.info/node_modules/postcss-scss/node_modules/postcss/package.json,atanas.info/node_modules/cssnano/node_modules/postcss/package.json,atanas.info/node_modules/postcss-discard-overridden/node_modules/postcss/package.json,atanas.info/node_modules/postcss-focus-visible/node_modules/postcss/package.json,atanas.info/node_modules/css-has-pseudo/node_modules/postcss/package.json,atanas.info/node_modules/postcss-unique-selectors/node_modules/postcss/package.json,atanas.info/node_modules/postcss-minify-font-values/node_modules/postcss/package.json,atanas.info/node_modules/postcss-custom-selectors/node_modules/postcss/package.json,atanas.info/node_modules/postcss-normalize-charset/node_modules/postcss/package.json,atanas.info/node_modules/postcss-normalize-string/node_modules/postcss/package.json,atanas.info/node_modules/postcss-page-break/node_modules/postcss/package.json,atanas.info/node_modules/postcss-env-function/node_modules/postcss/package.json,atanas.info/node_modules/postcss-normalize-display-values/node_modules/postcss/package.json,atanas.info/node_modules/css-loader/node_modules/postcss/package.json,atanas.info/node_modules/postcss-dir-pseudo-class/node_modules/postcss/package.json,atanas.info/node_modules/postcss-replace-overflow-wrap/node_modules/postcss/package.json,atanas.info/node_modules/postcss-sass/node_modules/postcss/package.json,atanas.info/node_modules/postcss-loader/node_modules/postcss/package.json,atanas.info/node_modules/postcss-selector-not/node_modules/postcss/package.json,atanas.info/node_modules/postcss-image-set-function/node_modules/postcss/package.json,atanas.info/node_modules/postcss-normalize-whitespace/node_modules/postcss/package.json,atanas.info/node_modules/postcss-discard-comments/node_modules/postcss/package.json,atanas.info/node_modules/postcss-selector-matches/node_modules/postcss/package.json,atanas.info/node_modules/postcss-less/node_modules/postcss/package.json,atanas.info/node_modules/postcss-overflow-shorthand/node_modules/postcss/package.json,atanas.info/node_modules/postcss-prefix-selector/node_modules/postcss/package.json,atanas.info/node_modules/postcss-lab-function/node_modules/postcss/package.json,atanas.info/node_modules/css-declaration-sorter/node_modules/postcss/package.json,atanas.info/node_modules/postcss-discard-empty/node_modules/postcss/package.json,atanas.info/node_modules/postcss-color-mod-function/node_modules/postcss/package.json,atanas.info/node_modules/parcel-bundler/node_modules/postcss/package.json,atanas.info/node_modules/postcss-pseudo-class-any-link/node_modules/postcss/package.json,atanas.info/node_modules/postcss-reduce-initial/node_modules/postcss/package.json,atanas.info/node_modules/postcss-gap-properties/node_modules/postcss/package.json,atanas.info/node_modules/postcss-place/node_modules/postcss/package.json,atanas.info/node_modules/stylelint/node_modules/postcss/package.json

Dependency Hierarchy: - postcss-preset-env-6.7.0.tgz (Root Library) - postcss-dir-pseudo-class-5.0.0.tgz - :x: **postcss-7.0.35.tgz** (Vulnerable Library)

Found in HEAD commit: 3c77aba896f1a2c3daa0199814d8416b30255cdc

Found in base branch: master

Vulnerability Details

The package postcss from 7.0.0 and before 8.2.10 are vulnerable to Regular Expression Denial of Service (ReDoS) during source map parsing.

Publish Date: 2021-04-12

URL: CVE-2021-23368

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: None - Availability Impact: Low

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23368

Release Date: 2021-04-12

Fix Resolution: postcss -8.2.10

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CVE-2021-23368 (Medium) detected in postcss-7.0.32.tgz, postcss-7.0.35.tgz #1211

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