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List: full-disclosure
Subject: [FD] jQuery < 3.5 Cross-Site Scripting (XSS)
From: Marcin Kozlowski <marcinguy () gmail ! com>
Date: 2020-04-23 7:32:06
Message-ID: CAP6wrbXLuVjiW0RWRHQGmqfN0LgAgYhrcyWFXvu0jTC=N07r+w () mail ! gmail ! com
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Hi list,
Timmy Willison recently released a new version of jQuery. jQuery 3.5 fixes
a cross-site scripting (XSS) vulnerability found in the jQuery's HTML
parser. The Snyk open source security platform estimates that 84% of all
websites may be impacted by jQuery XSS vulnerabilities.
Masato Kinugawa found a cross-site scripting (XSS) vulnerability in the
htmlPrefilter method of jQuery, and published an example showing a popup
alert window in the form of a challenge. (
https://xss.pwnfunction.com/challenges/ww3/)
I think this bug got too little attention in light of its possible impact.
Below is a CodeQL query that can find user controlled values passed to
html() which can be abused to perform Cross-Site Scripting.
Please check your projects, submit responsible disclosure to projects that
might be affected.
More in the repo:
https://github.com/marcinguy/jquery-xss-in-html/blob/master/README.md
Thanks,
Marcin
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