Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2025-59838

CVE-2025-59838LOW

monkeytypegame monkeytype — Monkeytype Vulnerable to Self-XSS on loading saved custom text

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   L   L   N   L   P   N   N   N    2.4   .0026   17.0     —

AFFECTED
  Product     Versions     Fixed
  monkeytype  < 25.44.0 –  —

TIMELINE
  Sep 22  Reserved by GitHub_M
  Sep 25  Published (CNA: GitHub_M)
  Oct 13  EXPLOIT PUBLISHED — CVE-2025-59838 (monkeytypegame monkeytype). Public exploit reference added.

CWE-79 · CNA: GitHub_M · CVSS v4.0 · 4 references · NVD status: Analyzed

Description

Monkeytype is a minimalistic and customizable typing test. In versions 25.36.0 and prior, improper handling of user input when loading a saved custom text results in XSS. This issue has been fixed in version 25.44.0.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 22, 2025	Reserved	Reserved by GitHub_M
September 25, 2025	Published	Published (CNA: GitHub_M)
October 13, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2025-59838 (monkeytypegame monkeytype). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
monkeytypegame	monkeytype	—	< 25.44.0	—

Weaknesses

CWE-79

References (4)

https://github.com/monkeytypegame/monkeytype/commit/42f6a16c6255d66cbb2be279131454866d98f2c9 [Patch]
https://github.com/monkeytypegame/monkeytype/commit/f025b121cbe437e29de432b4aa72e0de22c755b7 [Patch]
https://github.com/monkeytypegame/monkeytype/releases/tag/v25.44.0 [Release Notes]
https://github.com/monkeytypegame/monkeytype/security/advisories/GHSA-j4xx-fww5-774w [Exploit, Vendor Advisory]

Authoritative record: CVE-2025-59838 at cve.org

Vendors: monkeytypegame

Weaknesses: CWE-79

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2025-59838 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.