CVE-2021-20220

Published: Feb 23, 2021Modified: Jun 17, 2026

4.8

Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploitability: 2.2 / Impact: 2.5

Source: NVD

Description

A flaw was found in Undertow. A regression in the fix for CVE-2020-10687 was found. HTTP request smuggling related to CVE-2017-2666 is possible against HTTP/1.x and HTTP/2 due to permitting invalid characters in an HTTP request. This flaw allows an attacker to poison a web-cache, perform an XSS attack, or obtain sensitive information from request other than their own. The highest threat from this vulnerability is to data confidentiality and integrity.

Affected (6)

Products: Redhat: Undertow · Netapp: Active Iq Unified Manager, Oncommand Workflow Automation

Redhat

1 product

Undertow

Netapp

2 products

Active Iq Unified Manager

Oncommand Workflow Automation

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Redhat Undertow	Before 2.0.34
Redhat Undertow	From 2.1.0 to 2.1.6

Configuration B

4 vulnerable

Vulnerable Software	Affected Versions
Netapp Active Iq Unified Manager	All versions
Netapp Active Iq Unified Manager	All versions
Netapp Active Iq Unified Manager	All versions
Netapp Oncommand Workflow Automation	All versions