VULNERABILITY INTELLIGENCE

CVE-2025-66563

CVSS score6.1 MEDIUM
EPSS probability0.24%
CISA KEVNot currently listed
Published2025-12-04
Last modified2026-10-18
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Description

Monkeytype is a minimalistic and customizable typing test. In 25.49.0 and earlier, there is improper handling of user input which allows an attacker to execute malicious javascript on anyone viewing a malicious quote submission. quote.text and quote.source are user input, and they're inserted straight into the DOM. If they contain HTML tags, they will be rendered (after some escaping using quotes and textarea tags).

Weakness classification

  • security-advisories@github.com: CWE-79

Primary references