CVE-2023-37898 Information

Jun 22, 2024 cve

Description

Joplin is a free open source note taking and to-do application. A Cross-site Scripting (XSS) vulnerability allows an untrusted note opened in safe mode to execute arbitrary code. packages/renderer/MarkupToHtml.ts renders note content in safe mode by surrounding it with

and

without escaping any interior HTML tags. Thus an attacker can create a note that closes the opening

 tag then includes HTML that runs JavaScript. Because the rendered markdown iframe has the same origin as the toplevel document and is not sandboxed any scripts running in the preview iframe can access the top variable and thus access the toplevel NodeJS require function. require can then be used to import modules like fs or child_process and run arbitrary commands. This issue has been addressed in version 2.12.9 and all users are advised to upgrade. There are no known workarounds for this vulnerability.
Reference
https://github.com/laurent22/joplin/security/advisories/GHSA-hjmq-3qh4-g2r8
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/iframe#sandbox



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