Cross-site scripting in Joplin - CVE-2018-1000534

Detailed vulnerability description

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when processing data passed 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. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

How to mitigate CVE-2018-1000534

Sources

• https://github.com/laurent22/joplin/commit/494e235e18659574f836f84fcf9f4d4fcdcfcf89
• https://github.com/laurent22/joplin/issues/500