This article is a part of our Vulnerability Database (back to index)
Cross-site Scripting occurrences in Boostnote
In Boostnote 0.12.1, exporting to PDF contains opportunities for XSS attacks. (2021-05-18, CVE-2020-19924)
There is XSS in browser/components/MarkdownPreview.js in BoostIO Boostnote 0.11.15 via a label named flowchart, sequence, gallery, or chart, as demonstrated by a crafted SRC attribute of an IFRAME element, a different vulnerability than CVE-2019-12136. (2019-05-19, CVE-2019-12184)
There is XSS in BoostIO Boostnote 0.11.15 via a label named mermaid, as demonstrated by a crafted SRC attribute of an IFRAME element. (2019-05-16, CVE-2019-12136)
Boostnote v0.11.7 allows XSS during highlighting of Markdown text, as demonstrated by an onerror attribute of an IMG element. (2018-07-08, CVE-2018-13433)
Why Cross-site Scripting can be dangerous
Cross site scripting is an attack where a web page executes code that is injected by an adversary. It usually appears, when users input is presented. This attack can be used to impersonate a user, take over control of the session, or even steal API keys.
The attack can be executed e.g. when you application injects the request parameter directly into the HTML code of the page returned to the user:
https://server.com/confirmation?message=Transaction+Complete
what results in:
<span>Confirmation: Transaction Complete</span>
In that case the message can be modified to become a valid Javascript code, e.g.:
https://server.com/confirmation?message=<script>dangerous javascript code here</script>
and it will be executed locally by the user's browser with full access to the user's personal application/browser data:
<span>Confirmation: <script>dangerous javascript code here</script></span>