CVE-2025-66563

MediumCVSS 6.1/10Last modified Oct 18, 2026

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).

Metrics

CVSS 3.1 6.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

Affected software

No affected versions have been published.

Timeline

Published
Dec 4, 2025
Last modified
Oct 18, 2026
NVD status
Analyzed

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CVE-2025-66563: Medium severity, CVSS 6.1 | Vulnix