CyberRota Analysis
AI-GeneratedThe vulnerability in Joplin allows untrusted HTML generated by the fountain.js renderer to be executed in note output, potentially leading to cross-site scripting (XSS) attacks. This can enable attackers to execute scripts that read sensitive content or access data in the context of an authenticated user, particularly when notes are published through Joplin Server. Users of Joplin, especially those utilizing the desktop or mobile clients with Fountain rendering enabled, should prioritize updating to versions 3.6.15 or 3.7.2 to mitigate this risk.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.6.15 and 3.7.2, packages/renderer/MdToHtml/rules/fountain.ts passes HTML generated by the vendored fountain.js renderer into note output without sanitizing it. A malicious Fountain code block can therefore execute script when Fountain rendering is enabled in desktop or mobile clients, or when a note is published through Joplin Server where Fountain rendering is enabled by default. The script can read content subsequently loaded in the reused note viewer or, when published notes are served from the same domain as server content, access data available to an authenticated browser in the server origin. This issue is fixed in versions 3.6.15 and 3.7.2.