CVE-2025-27220

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 v3 4.0 MEDIUM

4.0^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27220.yml	Third Party Advisory
https://hackerone.com/reports/2890322	Permissions Required
https://lists.debian.org/debian-lts-announce/2025/03/msg00008.html

Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:a:ruby-lang:cgi::::::ruby::*
	cpe:2.3:a:ruby-lang:cgi::::::ruby::*
	cpe:2.3:a:ruby-lang:cgi:0.3.6:::::ruby::

OR	cpe:2.3:a:ruby-lang:ruby:3.1.0:::::::*
	cpe:2.3:a:ruby-lang:ruby:3.2.0:::::::*

History

03 Nov 2025, 22:18

Type	Values Removed	Values Added
Summary		(es) En la gema CGI anterior a 0.4.2 para Ruby, existe una vulnerabilidad de denegación de servicio de expresión regular (ReDoS) en el método Util#escapeElement.
First Time		Ruby-lang ruby Ruby-lang Ruby-lang cgi
CPE		cpe:2.3:a:ruby-lang:ruby:3.2.0:::::::* cpe:2.3:a:ruby-lang:ruby:3.1.0:::::::* cpe:2.3:a:ruby-lang:cgi::::::ruby::* cpe:2.3:a:ruby-lang:cgi:0.3.6:::::ruby::
References		() https://lists.debian.org/debian-lts-announce/2025/03/msg00008.html -
References	~~() https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27220.yml -~~	() https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27220.yml - Third Party Advisory
References	~~() https://hackerone.com/reports/2890322 -~~	() https://hackerone.com/reports/2890322 - Permissions Required

04 Mar 2025, 00:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-03-04 00:15

Updated : 2025-11-03 22:18

NVD link : CVE-2025-27220

Mitre link : CVE-2025-27220

CVE.ORG link : CVE-2025-27220

JSON object : View

Products Affected

ruby-lang

ruby
cgi

CWE

CWE-1333

Inefficient Regular Expression Complexity

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