Vulnerability in Ruby-lang Cgi
CVE-2021-33621
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 o…
EPSS: 0.023 (81.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Ruby-lang Cgi
- Ruby-lang Ruby
- Fedoraproject Fedora — versions 35, 36, 37
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Exploit, Third Party Advisory)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (mailing-list)
- cve@mitre.org (vendor-advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2021-33621?
- CVE-2021-33621 is a high-severity vulnerability in Ruby-lang Cgi, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 8.8/10. Published 2022-11-18.
- How severe is CVE-2021-33621?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-33621 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.