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CVE-2021-41819

Published: Jan 1, 2022Updated: May 22, 2025 Sources: CVE List NVD GHSA BDUCWE-565
NVD MITRE
7.5CVSSHIGH
EPSS Score
2.9%
Top 14.7%
CISA KEV
Not in KEV
Exploits
2 Known
Remediation
Patch Available

Description

CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-565

Affected Products

n/an/a
cgiruby-lang
Library
OSS Libraries / generic-library
rubyruby-lang
Library
OSS Libraries / generic-library
software collectionsredhat
On-prem
DevTools & CI / build-test-tools
enterprise linuxredhat
On-premOS
Operating Systems / linux-distro
ruby-langoss-projectOSS Librariesaka ruby, rexml
redhatcommercialUSOperating Systemsaka red hat
and 13 more affected products View all →

Exploitability

2 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

References

https://hackerone.com/reports/910552
hackerone.com
https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819/
ruby-lang.org
https://security.netapp.com/advisory/ntap-20220121-0003/
security.netapp.com
and 23 more references View all →

Timeline

Published
Jan 1, 2022
Last Updated
May 22, 2025

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