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Helmet-csp before 2.9.1 is vulnerable to a Configuration Override affecting the application's Content Security Policy (CSP). The package's browser sniffing for Firefox deletes the default-src CSP policy, which is the fallback policy. This allows an attacker to remove an application's default CSP, possibly rendering the application vulnerable to Cross-Site Scripting.
:heavy_check_mark: This issue was automatically closed by Mend because the vulnerable library in the specific branch(es) was either marked as ignored or it is no longer part of the Mend inventory.
WS-2019-0289 - Medium Severity Vulnerability
Vulnerable Library - helmet-csp-1.2.2.tgz
Content Security Policy middleware.
Library home page: https://registry.npmjs.org/helmet-csp/-/helmet-csp-1.2.2.tgz
Path to dependency file: /package.json
Path to vulnerable library: /node_modules/helmet-csp/package.json
Dependency Hierarchy: - helmet-2.3.0.tgz (Root Library) - :x: **helmet-csp-1.2.2.tgz** (Vulnerable Library)
Found in HEAD commit: 8b986f22dea650a412a3a76f6371bb96ca36dbc3
Found in base branch: master
Vulnerability Details
Helmet-csp before 2.9.1 is vulnerable to a Configuration Override affecting the application's Content Security Policy (CSP). The package's browser sniffing for Firefox deletes the default-src CSP policy, which is the fallback policy. This allows an attacker to remove an application's default CSP, possibly rendering the application vulnerable to Cross-Site Scripting.
Publish Date: 2019-11-18
URL: WS-2019-0289
CVSS 3 Score Details (6.1)
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: Required - Scope: Changed - Impact Metrics: - Confidentiality Impact: Low - Integrity Impact: Low - Availability Impact: None
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Origin: https://www.npmjs.com/advisories/1176
Release Date: 2019-11-18
Fix Resolution (helmet-csp): 2.9.1
Direct dependency fix Resolution (helmet): 3.21.0