Medium severity6.1NVD Advisory· Published Dec 4, 2025· Updated Jun 17, 2026
CVE-2025-66563
CVE-2025-66563
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).
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3cpe:2.3:a:monkeytype:monkeytype:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:monkeytype:monkeytype:*:*:*:*:*:*:*:*range: <=25.49.0
- (no CPE)range: <=25.49.0
- monkeytypegame/monkeytypev5Range: <= 25.49.0
Patches
Vulnerability mechanics
References
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