# Usage of vulnerable marked package

## Overview

* **Rule ID**: `javascript_third_parties_marked`
* **Applicable Languages**: Javascript
* **Weakness ID**: CWE-1333

## Description

For versions of Marked prior to 2.0.0, there is a vulnerability to Regular Expression Denial of Service (ReDoS) attacks.

## Remediation Guidelines

* **Do** upgrade marked to version 2.0.0 or greater.

## References

* [**Vulnerability explained**](https://nvd.nist.gov/vuln/detail/CVE-2021-21306)
* [**CWE-1333: Inefficient Regular Expression Complexity**](https://cwe.mitre.org/data/definitions/1333.html)

## Configuration

To omit this rule during a scan, and to provide you with continuous 24/7 code-level scanning, you can employ our [**SAST TOOL**](https://scopy.sec1.io/login)


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.sec1.io/user-docs/4-sast/3-javascript/usage-of-vulnerable-marked-package.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.