7.5

CVE-2021-41819: debian debian_linux

Modified
AliasesALPINE-CVE-2021-41819SUSE-SU-2022:3292-1UBUNTU-CVE-2021-41819
Published 01-01-2022Last modified 22-05-2025

Vulnerability summary

CVE-2021-41819 is a high (CVSS 7.5) vulnerability in debian debian_linux. EPSS estimates a 3.15% chance of exploitation in the next 30 days, higher than 87.9% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Prioritisepublic exploit

Public exploit (reference, Date unknown)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
3.15%
0%100%
Low · +0.22 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 25 · Related 8
DLA-2853-1DSA-5066-1DSA-5067-1MGASA-2021-0579OPENSUSE-SU-2024:11657-1OPENSUSE-SU-2024:11658-1

Timeline

  1. 01-01-2022
    PublishedVulnerability first disclosed.
  2. 22-05-2025
    Last modifiedVulnerability information updated.

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 metrics

7 scores · 6 sources · 2 versions

EPSS trend

Probability

3.15%

Chance of exploitation in the next 30 days

Percentile

88%

Versus all other CVEs

30-day change

Increase +0.22 pp

From 2.93% on 05-10-2026

05-10-202604-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (ruby-lang.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Opensuse4 products
  • factoryna
  • leapEOL15.2
  • ruby2.5&distro=openSUSE Leap 15.3< 2.5.9-150000.4.26.1
  • ruby2.5&distro=openSUSE Leap 15.4< 2.5.9-150000.4.26.1
Ubuntu4 products
  • ruby2.3< 2.3.1-2~ubuntu16.04.16+esm2
  • ruby2.5< 2.5.1-1ubuntu1.11
  • ruby2.7< 2.7.0-5ubuntu1.6
  • ruby3.0< 3.0.2-7ubuntu2
Suse3 products
  • ruby2.5&distro=SUSE Linux Enterprise Module for Basesystem 15 SP3< 2.5.9-150000.4.26.1
  • ruby2.5&distro=SUSE Linux Enterprise Module for Basesystem 15 SP4< 2.5.9-150000.4.26.1
  • linux_enterprise11.0:sp1 | 12.0 | 15.0
Debian2 products
Redhat2 products
Ruby-lang2 products
  • cgi0.1.0 | 0.2.0 | 0.3.0
  • ruby≤ 2.6.8 | ≥ 2.7.0, < 2.7.5 | ≥ 3.0.0, < 3.0.3
Alpine1 product
  • ruby≥ 2.7.0, < 2.7.5-r0 | ≥ 2.7.0, < 3.0.3-r0
Fedoraproject1 product
RubyGems1 product
  • cgi≥ 0.3.0, < 0.3.1 | ≥ 0.2.0, < 0.2.1 | < 0.1.0.1

9 vendors · 20 products

References

24 links
Show all 24 references