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NVD Vulnerability Details :
CVE-2021-33621
Modified
More InfoOfficial Page
Source-cve@mitre.org
View Known Exploited Vulnerability (KEV) details
Published At-18 Nov, 2022 | 23:15
Updated At-04 Nov, 2025 | 16:15

The cgi gem before 0.1.0.2, 0.2.x before 0.2.2, and 0.3.x before 0.3.5 for Ruby allows HTTP response splitting. This is relevant to applications that use untrusted user input either to generate an HTTP response or to create a CGI::Cookie object.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.18.8HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Type: Primary
Version: 3.1
Base score: 8.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CPE Matches
Ruby
ruby-lang
>>cgi>>Versions before 0.1.0.2(exclusive)
cpe:2.3:a:ruby-lang:cgi:*:*:*:*:*:ruby:*:*
Ruby
ruby-lang
>>cgi>>Versions from 0.2.0(inclusive) to 0.2.2(exclusive)
cpe:2.3:a:ruby-lang:cgi:*:*:*:*:*:ruby:*:*
Ruby
ruby-lang
>>cgi>>Versions from 0.3.0(inclusive) to 0.3.5(exclusive)
cpe:2.3:a:ruby-lang:cgi:*:*:*:*:*:ruby:*:*
Fedora Project
fedoraproject
>>fedora>>35
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
Fedora Project
fedoraproject
>>fedora>>36
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
Fedora Project
fedoraproject
>>fedora>>37
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
Ruby
ruby-lang
>>ruby>>Versions from 2.7.0(inclusive) to 2.7.7(exclusive)
cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
Ruby
ruby-lang
>>ruby>>Versions from 3.0.0(inclusive) to 3.0.5(exclusive)
cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
Ruby
ruby-lang
>>ruby>>Versions from 3.1.0(inclusive) to 3.1.3(exclusive)
cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-74Primarynvd@nist.gov
CWE ID: CWE-74
Type: Primary
Source: nvd@nist.gov
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://lists.debian.org/debian-lts-announce/2023/06/msg00012.htmlcve@mitre.org
N/A
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DQR7LWED6VAPD5ATYOBZIGJQPCUBRJBX/cve@mitre.org
N/A
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THVTYHHEOVLQFCFHWURZYO7PVUPBHRZD/cve@mitre.org
N/A
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YACE6ORF2QBXXBK2V2CM36D7TZMEJVAS/cve@mitre.org
N/A
https://security.gentoo.org/glsa/202401-27cve@mitre.org
N/A
https://security.netapp.com/advisory/ntap-20221228-0004/cve@mitre.org
Third Party Advisory
https://www.ruby-lang.org/en/news/2022/11/22/http-response-splitting-in-cgi-cve-2021-33621/cve@mitre.org
Exploit
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/06/msg00012.htmlaf854a3a-2127-422b-91ae-364da2661108
N/A
https://lists.debian.org/debian-lts-announce/2024/09/msg00000.htmlaf854a3a-2127-422b-91ae-364da2661108
N/A
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DQR7LWED6VAPD5ATYOBZIGJQPCUBRJBX/af854a3a-2127-422b-91ae-364da2661108
N/A
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THVTYHHEOVLQFCFHWURZYO7PVUPBHRZD/af854a3a-2127-422b-91ae-364da2661108
N/A
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YACE6ORF2QBXXBK2V2CM36D7TZMEJVAS/af854a3a-2127-422b-91ae-364da2661108
N/A
https://security.gentoo.org/glsa/202401-27af854a3a-2127-422b-91ae-364da2661108
N/A
https://security.netapp.com/advisory/ntap-20221228-0004/af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.ruby-lang.org/en/news/2022/11/22/http-response-splitting-in-cgi-cve-2021-33621/af854a3a-2127-422b-91ae-364da2661108
Exploit
Third Party Advisory
Hyperlink: https://lists.debian.org/debian-lts-announce/2023/06/msg00012.html
Source: cve@mitre.org
Resource: N/A
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DQR7LWED6VAPD5ATYOBZIGJQPCUBRJBX/
Source: cve@mitre.org
Resource: N/A
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THVTYHHEOVLQFCFHWURZYO7PVUPBHRZD/
Source: cve@mitre.org
Resource: N/A
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YACE6ORF2QBXXBK2V2CM36D7TZMEJVAS/
Source: cve@mitre.org
Resource: N/A
Hyperlink: https://security.gentoo.org/glsa/202401-27
Source: cve@mitre.org
Resource: N/A
Hyperlink: https://security.netapp.com/advisory/ntap-20221228-0004/
Source: cve@mitre.org
Resource:
Third Party Advisory
Hyperlink: https://www.ruby-lang.org/en/news/2022/11/22/http-response-splitting-in-cgi-cve-2021-33621/
Source: cve@mitre.org
Resource:
Exploit
Third Party Advisory
Hyperlink: https://lists.debian.org/debian-lts-announce/2023/06/msg00012.html
Source: af854a3a-2127-422b-91ae-364da2661108
Resource: N/A
Hyperlink: https://lists.debian.org/debian-lts-announce/2024/09/msg00000.html
Source: af854a3a-2127-422b-91ae-364da2661108
Resource: N/A
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DQR7LWED6VAPD5ATYOBZIGJQPCUBRJBX/
Source: af854a3a-2127-422b-91ae-364da2661108
Resource: N/A
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THVTYHHEOVLQFCFHWURZYO7PVUPBHRZD/
Source: af854a3a-2127-422b-91ae-364da2661108
Resource: N/A
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YACE6ORF2QBXXBK2V2CM36D7TZMEJVAS/
Source: af854a3a-2127-422b-91ae-364da2661108
Resource: N/A
Hyperlink: https://security.gentoo.org/glsa/202401-27
Source: af854a3a-2127-422b-91ae-364da2661108
Resource: N/A
Hyperlink: https://security.netapp.com/advisory/ntap-20221228-0004/
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Third Party Advisory
Hyperlink: https://www.ruby-lang.org/en/news/2022/11/22/http-response-splitting-in-cgi-cve-2021-33621/
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Exploit
Third Party Advisory
Change History
0Changes found
Details not found