Cross-site Scripting (XSS) Affecting jquery Open this link in a new tab package, versions <1.9.0

  • Attack Complexity


  • User Interaction


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  • snyk-id


  • published

    19 May 2020

  • disclosed

    19 May 2020

  • credit

    Robert McLaughlin

How to fix?

Upgrade jquery to version 1.9.0 or higher.


jquery is a package that makes things like HTML document traversal and manipulation, event handling, animation, and Ajax much simpler with an easy-to-use API that works across a multitude of browsers.

Affected versions of this package are vulnerable to Cross-site Scripting (XSS). load() fails to recognize and remove "<script>" HTML tags that contain a whitespace character, i.e: "</script >" which results in the enclosed script logic to be executed. This can lead to Cross-site Scripting attacks when an attacker has control of the enclosed script.

PoC by Robert McLaughlin


    <script src=""></script>
    <div id="mydiv"></div>
        $("#mydiv").load('inject.html #himom');


<div id="himom"><script>alert('Arbitrary Code Execution');</script ></div>