Cross-site Scripting (XSS) Affecting janus package, versions <0.11.5-4


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.84% (57th percentile)

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  • Snyk IDSNYK-ECHOLATEST-JANUS-20936493
  • published14 Oct 2026
  • disclosed27 Nov 2021

Introduced: 27 Nov 2021

CVE-2021-4020  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade Echo:latest janus to version 0.11.5-4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream janus package and not the janus package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

janus-gateway is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS Base Scores

version 3.1