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Tag: Browser security

Marginwidth/marginheight – the unexpected cross-origin communication channel

Michał Bentkowski | July 13, 2020July 13, 2020 | Research

On 6th July 2020 I’ve announced a XSS challenge on my Twitter. So far only four people were able to solve it and every single one of them told me that they had never heard about the quirk used in the challenge before. So here’s a writeup explaining this quirk along with some backstory. The …

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Post of the month

18 Nov 2019

XSS in GMail’s AMP4Email via DOM Clobbering

Michał Wnękowicz

Security Research Manager

For this month I propose: "XSS in GMail's AMP4Email via DOM Clobbering" which was nominated to "Top 10 web hacking techniques of 2019" by Portswigger.

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Recent Posts

  • Helping secure DOMPurify (part 1) December 21, 2020
  • Mutation XSS via namespace confusion – DOMPurify < 2.0.17 bypass September 21, 2020
  • Prototype pollution – and bypassing client-side HTML sanitizers August 18, 2020
  • HTML sanitization bypass in Ruby Sanitize < 5.2.1 July 22, 2020
  • Marginwidth/marginheight – the unexpected cross-origin communication channel July 13, 2020
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