Vulnerability · Published Sep 25, 2025 · Assigned by GitHub_M
CVE-2025-59838Monkeytype Vulnerable to Self-XSS on loading saved custom text
Low 2.4
In plain English
A low-severity cross-site scripting in monkeytype from monkeytypegame. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities).
Severity (CVSS 4.0)2.4Low
Exploit odds (30 days)0.3%top 83.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| monkeytypegame | monkeytype | < 25.44.0 |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
References
- https://github.com/monkeytypegame/monkeytype/security/advisories/GHSA-j4xx-fww5-774w x_refsource_CONFIRM
- https://github.com/monkeytypegame/monkeytype/commit/42f6a16c6255d66cbb2be279131454866d98f2c9 x_refsource_MISC
- https://github.com/monkeytypegame/monkeytype/commit/f025b121cbe437e29de432b4aa72e0de22c755b7 x_refsource_MISC
- https://github.com/monkeytypegame/monkeytype/releases/tag/v25.44.0 x_refsource_MISC