Authentication Bypass in console-io

published 2018-05-31 8 y ago modified 2026-06-17 4 mo ago also GHSA-q52j-4q2q-hcj6 , EUVD-2019-0327

cvss: 9.8; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.3%; EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits: 0; none known

console-io is a module that allows users to implement a web console in their application. A malicious user could bypass the authentication and execute any command that the user who is running the console-io application 2.2.13 and earlier is able to run. This means that if console-io was running from root, the attacker would have full access to the system. This vulnerability exists because the console-io application does not configure socket.io to require authentication, which allows a malicious user to connect via a websocket to send commands and receive the response.

Patch / fix

fixed in 1

npm console-io 2.3.0

Exploit prediction

2.33% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C
GitHub	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	console-io	<2.3.0	2.3.0

Affected products

HackerOne console-io node module

Classification

Weakness

CWE-287 Improper Authentication

References

nodesecurity.io /advisories/90
third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2016-10532
advisory
github.com /advisories/GHSA-q52j-4q2q-hcj6
advisory
npmjs.com /advisories/90
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary