CGI Gem up to 0.3.6/0.4.1 on Ruby redos

CVSS Meta Temp Score
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CTI Interest Score
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3.8$0-$5k0.00

Summaryinfo

A vulnerability has been found in CGI Gem up to 0.3.6/0.4.1 on Ruby and classified as problematic. The affected element is an unknown function. The manipulation leads to redos. This vulnerability is traded as CVE-2025-27220. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in CGI Gem up to 0.3.6/0.4.1 on Ruby. This issue affects an unknown part. The manipulation with an unknown input leads to a redos vulnerability. Using CWE to declare the problem leads to CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. Impacted is availability. The summary by CVE is:

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

The advisory is shared at hackerone.com. The identification of this vulnerability is CVE-2025-27220 since 02/20/2025. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1449.003 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 232149 (Linux Distros Unpatched Vulnerability : CVE-2025-27220), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.3.5.1, 0.3.7 or 0.4.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (232149) and EUVD (EUVD-2025-5509). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.8
VulDB Meta Temp Score: 3.8

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 4.0
CNA Vector (MITRE): 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Redos
CWE: CWE-1333 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 232149
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-27220

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: CGI Gem 0.3.5.1/0.3.7/0.4.2

Timelineinfo

02/20/2025 🔍
03/04/2025 +12 days 🔍
03/04/2025 +0 days 🔍
06/01/2025 +89 days 🔍

Sourcesinfo

Advisory: hackerone.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2025-27220 (🔍)
GCVE (CVE): GCVE-0-2025-27220
GCVE (VulDB): GCVE-100-298469
EUVD: 🔍

Entryinfo

Created: 03/04/2025 07:03
Updated: 06/01/2025 22:59
Changes: 03/04/2025 07:03 (65), 03/06/2025 19:17 (2), 06/01/2025 22:59 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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