PT-2021-22841 · Unknown+1 · Janus-Gateway+1

Published 2021-11-27 · Updated 2025-01-21 · CVE-2021-4020

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions janus-gateway (affected versions not specified)

Description The issue is related to Improper Neutralization of Input During Web Page Generation, also known as Cross-site Scripting. This means that the software does not properly neutralize user input, allowing an attacker to inject malicious code into web pages.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

Weakness Enumeration

CWE-79

Related Identifiers

ALT-PU-2022-1193

ALT-PU-2024-9714

ALT-PU-2025-1577

CVE-2021-4020

OPENSUSE-SU-2024:11675-1

Affected Products

Alt Linux

Janus-Gateway

References · 12

• 🔥 https://huntr.dev/bounties/9814baa8-7bdd-4e31-a132-d9d15653409e · Exploit
• https://github.com/meetecho/janus-gateway/commit/d3fc00ec803d6c41d8f98908732f44e7f4911a1c · Patch
• https://ubuntu.com/security/CVE-2021-4020 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-4020 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-4020 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-4020 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-4020 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-4020 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-4020 · Vendor Advisory
• https://github.com/meetecho/janus-gateway/commit/ba166e9adebfe5343f826c6a9e02299d35414ffd · Note
• https://t.me/cvenotify/23855 · Telegram Post
• https://t.me/cvenotify/23842 · Telegram Post