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CVE-2025-27220 Details

In the CGI gem before 0.4.2 for Ruby, a Regular Expression Denial of Service (ReDoS) vulnerability exists in the Util#escapeElement method.

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:4 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://lists.debian.org/debian-lts-announce/2025/03/msg00008.html	CVE
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27220.yml	[email protected]	Third Party Advisory
https://hackerone.com/reports/2890322	[email protected]	Permissions Required

CWE-ID	CWE Name	Source
CWE-1333	Inefficient Regular Expression Complexity	[email protected]
CWE-1333	Inefficient Regular Expression Complexity	[email protected]

Product	Versions
ruby-lang cgi	< 0.3.5.1 >= 0.4.0, < 0.4.2 0.3.6
CPE cpe:2.3:a:ruby-lang:cgi::::::ruby::* cpe:2.3:a:ruby-lang:cgi:0.3.6:::::ruby:: Remediation No remediation found in references.
ruby-lang ruby	3.1.0 3.2.0
CPE cpe:2.3:a:ruby-lang:ruby:3.1.0:::::::* cpe:2.3:a:ruby-lang:ruby:3.2.0:::::::* Remediation No remediation found in references.

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