CVE-2021-41819

Advisory lineage Upstream: 0 Downstream: 29
Modified
Published: 01 Jan 2022, 00:00
Last modified:22 May 2025, 15:00

Vulnerability Summary

Overall Risk (default)
medium
40/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
0.77% LOW
1% probability +0.08%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

01 Jan 2022, 00:00
Published
Vulnerability first disclosed
22 May 2025, 15:00
Last Modified
Vulnerability 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

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
  • v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:P/A:N

EPSS Trends

Current EPSS score: 0.77%• Percentile: 74%

Techniques & Countermeasures

  • CWE-565•Reliance on Cookies without Validation and Integrity Checking

    The product relies on the existence or values of cookies when performing security-critical operations, but it does not properly ensure that the setting is valid for the associated user.

Affected Systems

  • debian•debian_linux

    9.0 | 10.0 | 11.0

  • fedoraproject•fedora

    34 | 35

  • opensuse•factory

    na

  • opensuse•leap

    15.2

  • redhat•enterprise_linux

    8.0

  • redhat•software_collections

    na

  • ruby-lang•cgi

    0.1.0 | 0.2.0 | 0.3.0

  • ruby-lang•ruby

    ≤ 2.6.8 | ≥ 2.7.0, < 2.7.5 | ≥ 3.0.0, < 3.0.3

  • suse•linux_enterprise

    11.0:sp1 | 12.0 | 15.0

References (6)