CVE-2025-27220

State: Published
Severity: 4.0 Medium
Published: Mar 3, 2025
Updated: Nov 3, 2025
Reserved: Feb 20, 2025

Description

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

Scores

CVSS	Score	Vector	Source
3.1	4.0 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L	mitre

Weaknesses

CWE-1333 Inefficient Regular Expression Complexity

Affected Products

Product	Versions
CGIruby-lang	before 0.3.5.1Affected 0.3.6 to before 0.3.7Affected 0.4.0 to before 0.4.2Affected

References

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

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