What’s Vulnerable › Vulnerabilities

CVE-2021-22942

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-18 · updated 2026-06-17
• Weakness: CWE-601

Description

A possible open redirect vulnerability in the Host Authorization middleware in Action Pack >= 6.0.0 that could allow attackers to redirect users to a malicious website.

Affected products

• Ruby on Rails: from 6.0.0 before 6.0.4.1; from 6.1.0 before 6.1.4.1 — fixed in 6.0.4.1, 6.1.4.1

How to fix

Upgrade to a fixed version: Ruby on Rails 6.0.4.1, 6.1.4.1. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2021/12/14/5
• https://security.netapp.com/advisory/ntap-20240202-0005/
• https://weblog.rubyonrails.org/2021/8/19/Rails-6-0-4-1-and-6-1-4-1-have-been-released/
• https://www.debian.org/security/2023/dsa-5372
• http://www.openwall.com/lists/oss-security/2021/12/14/5
• https://security.netapp.com/advisory/ntap-20240202-0005/
• https://weblog.rubyonrails.org/2021/8/19/Rails-6-0-4-1-and-6-1-4-1-have-been-released/
• https://www.debian.org/security/2023/dsa-5372

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