Joplin version prior to 1.0.90 contains a Cross-site Scripting (XSS) evolving into code execution due to enabled nodeIntegration for that particular BrowserWindow instance where XSS was identified from vulnerability in Note content field - information on the fix can be found here laurent22/joplin@494e235 that can result in executing unauthorized code within the rights in which the application is running. This attack appear to be exploitable via Victim synchronizing notes from the cloud services or other note-keeping services which contain malicious code. This vulnerability appears to have been fixed in 1.0.90 and later.

References

• https://nvd.nist.gov/vuln/detail/CVE-2018-1000534
• laurent22/joplin#500
• laurent22/joplin@494e235