Cross-site scripting in Zonote

1) Cross-site scripting

EUVDB-ID: #VU49388

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-35717

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: Yes

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks via a crafted note, with resultant Remote Code Execution (because nodeIntegration in webPreferences is true).

The vulnerability exists due to insufficient sanitization of user-supplied data within a specially crafted note. 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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

zonote: 0.1.0 - 0.4.0

External links

http://github.com/hmartos/cve-2020-35717
http://github.com/zonetti/zonote
http://medium.com/bugbountywriteup/remote-code-execution-through-cross-site-scripting-in-electron-f3b891ad637
http://www.electronjs.org/apps/zonote

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.