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XSS in body with image onerror #18

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UlisseMini opened this issue Apr 10, 2021 · 0 comments
Open

XSS in body with image onerror #18

UlisseMini opened this issue Apr 10, 2021 · 0 comments

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@UlisseMini
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UlisseMini commented Apr 10, 2021 •
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Describe the bug
Articles with <img onerror="alert(1)"></img> in the body trigger XSS

To Reproduce
Steps to reproduce the behavior:

  1. Go to https://jetli.github.io/rust-yew-realworld-example-app/#/article/img-src-onerror-alert-xss-in-title-with-img-onerror-img-dvpw7w
  2. See alert

Expected behavior
The body is shown without an alert triggering

Screenshots
image

The problem in the code is here. pulldown_cmark doesn't sanitize.
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@UlisseMini