CVE-2025-27220 – cgi

Package

Manager: gem
Name: cgi
Vulnerable Version: >=0 <0.3.5.1 || =0.3.6 || >=0.3.6 <0.3.7 || >=0.4.0 <0.4.2

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L

CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

EPSS: 0.00203 pctl0.427

Details

CGI has Regular Expression Denial of Service (ReDoS) potential in Util#escapeElement There is a possibility for Regular expression Denial of Service (ReDoS) by in the cgi gem. This vulnerability has been assigned the CVE identifier CVE-2025-27220. We recommend upgrading the cgi gem. ## Details The regular expression used in `CGI::Util#escapeElement` is vulnerable to ReDoS. The crafted input could lead to a high CPU consumption. This vulnerability only affects Ruby 3.1 and 3.2. If you are using these versions, please update CGI gem to version 0.3.5.1, 0.3.7, 0.4.2 or later. ## Affected versions cgi gem versions <= 0.3.5, 0.3.6, 0.4.0 and 0.4.1. ## Credits Thanks to svalkanov for discovering this issue. Also thanks to nobu for fixing this vulnerability.

Metadata

Created: 2025-03-03T22:05:08Z
Modified: 2025-03-04T16:37:25Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/03/GHSA-mhwm-jh88-3gjf/GHSA-mhwm-jh88-3gjf.json
CWE IDs: ["CWE-1333"]
Alternative ID: GHSA-mhwm-jh88-3gjf
Finding: F211
Auto approve: 1