CVE-2025-59838

Monkeytype Vulnerable to Self-XSS on loading saved custom text

2.4 Low

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: Passive

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: None

Exploit likelihood

0.25%Up 0.2 points since Sep 26, 2025

What each source reports

CVE List Score used 2.4

Monkeytype Vulnerable to Self-XSS on loading saved custom text

Record: CVE-2025-59838
CVSS 4.0: 2.4 LowCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2025-31098 2.4

Record: EUVD-2025-31098
CVSS 4.0: 2.4 LowCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
Updated: 2026-11-02

NVD 2.4

Record: CVE-2025-59838
CVSS 4.0: 2.4 LowCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

OSV 2.4

Monkeytype Vulnerable to Self-XSS on loading saved custom text

Record: CVE-2025-59838
CVSS 4.0: 2.4 LowCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
Weakness: CWE-79
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-59838 is a low vulnerability (CVSS 2.4) in Monkeytype, published September 25, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.25%, the 16th percentile. No source names a fixed version.