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kurwov@3.2.3 vulnerabilities

The fastest Markov Chain library for JavaScript

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Direct Vulnerabilities

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

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Vulnerability Vulnerable Version
  • M
Improper Input Validation

kurwov is an a markov chain library

Affected versions of this package are vulnerable to Improper Input Validation due to improper data sanitization in the MarkovData#getNext method used in Markov#generate and Markov#choose. A maliciously crafted string in the dataset can cause the function to throw an error and stop running properly by exploiting the sanitization bypass when a forbidden substring followed by a space character is encountered. This leads to the data being defined as a special function found in its prototype instead of an array, and when data is indexed by a random number, it is supposed to return a string but returns undefined as it's a function, causing the endsWith call to throw.

How to fix Improper Input Validation?

Upgrade kurwov to version 3.2.5 or higher.

>=3.1.0 <3.2.5
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