The package cached-path-relative before 1.1.0 are vulnerable to Prototype Pollution via the cache variable that is set as {} instead of Object.create(null) in the cachedPathRelative function, which allows access to the parent prototype properties when the object is used to create the cached relative path. When using the origin path as __proto__, the attribute of the object is accessed instead of a path. **Note:** This vulnerability derives from an incomplete fix in https://security.snyk.io/vuln/SNYK-JS-CACHEDPATHRELATIVE-72573
CVE-2021-23518 - Critical Severity Vulnerability
Vulnerable Library - cached-path-relative-1.0.2.tgz
Memoize the results of the path.relative function
Library home page: https://registry.npmjs.org/cached-path-relative/-/cached-path-relative-1.0.2.tgz
Path to dependency file: /package.json
Path to vulnerable library: /node_modules/cached-path-relative/package.json
Dependency Hierarchy: - browserify-16.5.1.tgz (Root Library) - :x: **cached-path-relative-1.0.2.tgz** (Vulnerable Library)
Found in base branch: master
Vulnerability Details
The package cached-path-relative before 1.1.0 are vulnerable to Prototype Pollution via the cache variable that is set as {} instead of Object.create(null) in the cachedPathRelative function, which allows access to the parent prototype properties when the object is used to create the cached relative path. When using the origin path as __proto__, the attribute of the object is accessed instead of a path. **Note:** This vulnerability derives from an incomplete fix in https://security.snyk.io/vuln/SNYK-JS-CACHEDPATHRELATIVE-72573
Publish Date: 2022-01-21
URL: CVE-2021-23518
CVSS 3 Score Details (9.8)
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: High - Integrity Impact: High - 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-2021-23518
Release Date: 2022-01-21
Fix Resolution (cached-path-relative): 1.1.0
Direct dependency fix Resolution (browserify): 16.5.2
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