CVE-2025-66563: high-severity vulnerability in monkeytypegame monkeytype
Monkeytype vulnerable to stored XSS in approve quotes page
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.3%
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).
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Affected products
monkeytypegame · monkeytypeRelated CVEs — monkeytypegame monkeytype
In the same product, most dangerous first.
CVE-2024-41127HIGHMonkeytype is vulnerable to Poisoned Pipeline Execution through Code Injection in its `ci-failure-comment.yml` GitHub Workflow, enabling attackers to gain `pull-requests` write access.EPSS 0.9%CVE-2026-69183HIGHMonkeytype: Rate-limit and anti-brute-force controls bypassable via spoofed HTTP headers (forgotPasswordEmail/verificationEmail mail bombing and badAuth bypass)EPSS 0.5%CVE-2026-118762CRITICALMonkeytype: fork PR can execute code with elevated GITHUB_TOKENEPSS 0.3%CVE-2025-59838LOWMonkeytype Vulnerable to Self-XSS on loading saved custom textEPSS 0.3%