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netlify-cms-widget-markdown@2.5.0-beta.0 vulnerabilities

Widget for editing markdown in Netlify CMS.

  • latest version

    2.15.1

  • latest non vulnerable version

    2.15.1

  • first published

    6 years ago

  • latest version published

    2 years ago

  • licenses detected

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    Direct Vulnerabilities

    Known vulnerabilities in the netlify-cms-widget-markdown package. This does not include vulnerabilities belonging to this package’s dependencies.

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    VulnerabilityVulnerable Version
    • M
    Cross-site Scripting (XSS)

    netlify-cms-widget-markdown is a markdown package for netlify-cms.

    Affected versions of this package are vulnerable to Cross-site Scripting (XSS). It is possible to insert malicious JavaScript when creating a post using the markdown editor feature. This malicious JavaScript is then stored within the application and is executed when a user visits this webpage.

    PoC

    https://cms-demo.netlify.com/#/collections/posts/new
Switch to markdown mode in edtior.
Paste the following in to the editor <img src="foobar.png" onerror="alert('hello')">
See the alert dialog.

    How to fix Cross-site Scripting (XSS)?

    Upgrade netlify-cms-widget-markdown to version 2.12.9 or higher.

    <2.12.9
    Go back to all versions of this package