## CVE-2021-33502 - High Severity Vulnerability

Vulnerable Library - normalize-url-3.3.0.tgz

Normalize a URL

Library home page: https://registry.npmjs.org/normalize-url/-/normalize-url-3.3.0.tgz

Path to dependency file: typescript-tools/package.json

Path to vulnerable library: typescript-tools/node_modules/postcss-normalize-url/node_modules/normalize-url/package.json

Dependency Hierarchy: - reshadow-0.0.1-alpha.80.tgz (Root Library) - babel-0.0.1-alpha.80.tgz - cssnano-4.1.11.tgz - cssnano-preset-default-4.0.8.tgz - postcss-normalize-url-4.0.1.tgz - :x: **normalize-url-3.3.0.tgz** (Vulnerable Library)

Found in HEAD commit: b8ae77bb59c17e50210c4d27908c3f903ddca323

Vulnerability Details

The normalize-url package before 4.5.1, 5.x before 5.3.1, and 6.x before 6.0.1 for Node.js has a ReDoS (regular expression denial of service) issue because it has exponential performance for data: URLs.

Publish Date: 2021-05-24

URL: CVE-2021-33502

CVSS 3 Score Details (7.5)

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: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33502

Release Date: 2021-05-24

Fix Resolution: normalize-url - 4.5.1, 5.3.1, 6.0.1

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CVE-2021-33502 (High) detected in normalize-url-3.3.0.tgz - autoclosed #1503

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