CVE-2021-22881

nvd nist nuclei

Published: Feb 11, 2021Modified: Jun 17, 2026

6.1

Vector

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

Exploitability: 2.8 / Impact: 2.7

Source: NVD

Description

The Host Authorization middleware in Action Pack before 6.1.2.1, 6.0.3.5 suffers from an open redirect vulnerability. Specially crafted `Host` headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. Impacted applications will have allowed hosts with a leading dot. When an allowed host contains a leading dot, a specially crafted `Host` header can be used to redirect to a malicious website.

Affected (3)

Products: Rubyonrails: Rails · Fedoraproject: Fedora

1 product

1 product

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Rubyonrails Rails	From 6.0.0 to 6.0.3.5
Rubyonrails Rails	From 6.1.0 to 6.1.2.1

Configuration B

1 vulnerable

Vulnerable Software	Affected Versions
Fedoraproject Fedora	Version 33

Related CWEs

URL Redirection to Untrusted Site ('Open Redirect')

A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks.

References (14)

http://www.openwall.com/lists/oss-security/2021/05/05/2

Source: support@hackerone.com

Mailing ListMitigationThird Party Advisory

http://www.openwall.com/lists/oss-security/2021/08/20/1

Source: support@hackerone.com

Mailing ListMitigationThird Party Advisory

http://www.openwall.com/lists/oss-security/2021/12/14/5

Source: support@hackerone.com

ExploitMailing ListPatch

https://benjamin-bouchet.com/cve-2021-22881-faille-de-securite-dans-le-middleware-hostauthorization/

Source: support@hackerone.com

PatchThird Party Advisory

https://discuss.rubyonrails.org/t/cve-2021-22881-possible-open-redirect-in-host-authorization-middleware/77130

Source: support@hackerone.com

MitigationPatchVendor Advisory

https://hackerone.com/reports/1047447

Source: support@hackerone.com

ExploitPatchThird Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XQ3NS4IBYE2I3MVMGAHFZBZBIZGHXHT3/

Source: support@hackerone.com

http://www.openwall.com/lists/oss-security/2021/05/05/2

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListMitigationThird Party Advisory

http://www.openwall.com/lists/oss-security/2021/08/20/1

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListMitigationThird Party Advisory

http://www.openwall.com/lists/oss-security/2021/12/14/5

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitMailing ListPatch

https://benjamin-bouchet.com/cve-2021-22881-faille-de-securite-dans-le-middleware-hostauthorization/

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

https://discuss.rubyonrails.org/t/cve-2021-22881-possible-open-redirect-in-host-authorization-middleware/77130

Source: af854a3a-2127-422b-91ae-364da2661108

MitigationPatchVendor Advisory

https://hackerone.com/reports/1047447

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitPatchThird Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XQ3NS4IBYE2I3MVMGAHFZBZBIZGHXHT3/

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.