What is CVE-2019-5422?

CVE-2019-5422 is a medium-severity vulnerability in Buttle Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-04-03.

How severe is CVE-2019-5422?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Buttle Project

CVE-2019-5422

XSS in buttle npm package version 0.2.0 causes execution of attacker-provided code in the victim's browser when an attacker creates an arbitrary file on the server.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-04-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.012 (66.3th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Buttle Project — versions 0.2.0
Npm, Inc. Buttle — versions 0.2.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

hackerone.com/reports/331110 (Third Party Advisory)

Frequently asked questions

What is CVE-2019-5422?: CVE-2019-5422 is a medium-severity vulnerability in Buttle Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-04-03.
How severe is CVE-2019-5422?: Medium severity. CVSS v3 base score is 6.1 out of 10.