Impact Passing HTML from untrusted sources - even after sanitizing it - to one of jQuery's DOM manipulation methods (i.e. .html(), .append(), and others) may execute untrusted code.

Patches This problem is patched in jQuery 3.5.0.

Workarounds To workaround the issue without upgrading, adding the following to your code:

js jQuery.htmlPrefilter = function( html ) { return html; };

You need to use at least jQuery 1.12/2.2 or newer to be able to apply this workaround.

References https://blog.jquery.com/2020/04/10/jquery-3-5-0-released/ https://jquery.com/upgrade-guide/3.5/

For more information If you have any questions or comments about this advisory, search for a relevant issue in the jQuery repo. If you don't find an answer, open a new issue.

A Prototype Pollution vulnerability was found in jquery. Untrusted JSON passed to the extend function could lead to modifying objects up the prototype chain, including the global Object. A crafted JSON object passed to a vulnerable method could lead to denial of service or data injection, with various consequences.