CVE-2020-36048 (High) detected in engine.io-3.2.1.tgz

## CVE-2020-36048 - High Severity Vulnerability
Vulnerable Library - engine.io-3.2.1.tgz

The realtime engine behind Socket.IO. Provides the foundation of a bidirectional connection between client and server

Library home page: https://registry.npmjs.org/engine.io/-/engine.io-3.2.1.tgz

Path to dependency file: /package.json

Path to vulnerable library: /node_modules/engine.io/package.json

Dependency Hierarchy:
- karma-4.4.1.tgz (Root Library)
- socket.io-2.1.1.tgz
- :x: **engine.io-3.2.1.tgz** (Vulnerable Library)

Vulnerability Details

Engine.IO before 4.0.0 allows attackers to cause a denial of service (resource consumption) via a POST request to the long polling transport.

Publish Date: 2021-01-08

URL: CVE-2020-36048

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-2020-36048

Release Date: 2021-01-08

Fix Resolution (engine.io): 3.6.0

Direct dependency fix Resolution (karma): 6.0.0

***
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Start by reviewing /package.json and the dependency hierarchy for karma-4.4.1, socket.io-2.1.1, and engine.io-3.2.1. Check the available upgrade path to the stated fixed versions, then verify that the vulnerable engine.io version is no longer installed and that the extension's existing checks still pass.

Written by the indexing model from the issue text.