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Vulnerability details: VCID-1bxs-yghe-cyck
Vulnerability ID VCID-1bxs-yghe-cyck
Aliases CVE-2021-22942
GHSA-2rqw-v265-jf8c
Summary URL Redirection to Untrusted Site ('Open Redirect') 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.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 5.4 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-22942.json
cvssv3.1 6.1 https://access.redhat.com/security/cve/cve-2021-22942
generic_textual MODERATE https://access.redhat.com/security/cve/cve-2021-22942
epss 0.00533 https://api.first.org/data/v1/epss?cve=CVE-2021-22942
epss 0.00533 https://api.first.org/data/v1/epss?cve=CVE-2021-22942
epss 0.00533 https://api.first.org/data/v1/epss?cve=CVE-2021-22942
epss 0.00533 https://api.first.org/data/v1/epss?cve=CVE-2021-22942
epss 0.00533 https://api.first.org/data/v1/epss?cve=CVE-2021-22942
epss 0.00533 https://api.first.org/data/v1/epss?cve=CVE-2021-22942
epss 0.00533 https://api.first.org/data/v1/epss?cve=CVE-2021-22942
epss 0.00533 https://api.first.org/data/v1/epss?cve=CVE-2021-22942
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-2rqw-v265-jf8c
cvssv3.1 6.1 https://github.com/rails/rails
generic_textual MODERATE https://github.com/rails/rails
cvssv3.1 6.1 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2021-22942.yml
generic_textual MODERATE https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2021-22942.yml
cvssv3 7.6 https://groups.google.com/g/rubyonrails-security/c/wB5tRn7h36c
cvssv3.1 6.1 https://groups.google.com/g/rubyonrails-security/c/wB5tRn7h36c
generic_textual MODERATE https://groups.google.com/g/rubyonrails-security/c/wB5tRn7h36c
cvssv3.1 6.1 https://nvd.nist.gov/vuln/detail/CVE-2021-22942
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-22942
cvssv3.1 6.1 https://rubygems.org/gems/actionpack
generic_textual MODERATE https://rubygems.org/gems/actionpack
archlinux Medium https://security.archlinux.org/AVG-2492
archlinux Medium https://security.archlinux.org/AVG-2493
cvssv3.1 6.1 https://security.netapp.com/advisory/ntap-20240202-0005
generic_textual MODERATE https://security.netapp.com/advisory/ntap-20240202-0005
cvssv3.1 6.1 https://weblog.rubyonrails.org/2021/8/19/Rails-6-0-4-1-and-6-1-4-1-have-been-released
generic_textual MODERATE https://weblog.rubyonrails.org/2021/8/19/Rails-6-0-4-1-and-6-1-4-1-have-been-released
cvssv3.1 6.1 https://www.debian.org/security/2023/dsa-5372
generic_textual MODERATE https://www.debian.org/security/2023/dsa-5372
cvssv3.1 6.1 http://www.openwall.com/lists/oss-security/2021/12/14/5
generic_textual MODERATE http://www.openwall.com/lists/oss-security/2021/12/14/5
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-22942.json
https://api.first.org/data/v1/epss?cve=CVE-2021-22942
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22942
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44528
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-21831
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22577
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23633
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-27777
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-22792
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-22794
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-22795
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-22796
https://github.com/rails/rails
https://groups.google.com/g/rubyonrails-security/c/wB5tRn7h36c
https://rubygems.org/gems/actionpack
https://security.netapp.com/advisory/ntap-20240202-0005
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://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
1995940 https://bugzilla.redhat.com/show_bug.cgi?id=1995940
992586 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=992586
AVG-2492 https://security.archlinux.org/AVG-2492
AVG-2493 https://security.archlinux.org/AVG-2493
CVE-2021-22942 https://access.redhat.com/security/cve/cve-2021-22942
CVE-2021-22942 https://nvd.nist.gov/vuln/detail/CVE-2021-22942
CVE-2021-22942.YML https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2021-22942.yml
GHSA-2rqw-v265-jf8c https://github.com/advisories/GHSA-2rqw-v265-jf8c
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-22942.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

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none

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required

unchanged

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none

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low

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high

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none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/security/cve/cve-2021-22942
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

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high

low

none

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low

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high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/rails/rails
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2021-22942.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://groups.google.com/g/rubyonrails-security/c/wB5tRn7h36c
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-22942
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://rubygems.org/gems/actionpack
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://security.netapp.com/advisory/ntap-20240202-0005
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://weblog.rubyonrails.org/2021/8/19/Rails-6-0-4-1-and-6-1-4-1-have-been-released
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://www.debian.org/security/2023/dsa-5372
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at http://www.openwall.com/lists/oss-security/2021/12/14/5
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.67302
EPSS Score 0.00533
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:48:48.155789+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/gem/actionpack/CVE-2021-22942.yml 38.0.0