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CVE-2025-27220

Quick assessment

Affected
ruby-lang CGI
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Ruby是松本行弘（Yukihiro Matsumoto）个人开发者的一种跨平台、面向对象的动态类型编程语言。 Ruby 0.4.2之前版本存在安全漏洞，该漏洞源于Util#escapeElement方法中的正则表达式拒绝服务。

CVSS 4.0 · Medium EPSS 0.73% · P51

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood
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I. Basic Information for CVE-2025-27220

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5
Vulnerability Title
Ruby 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ruby是松本行弘（Yukihiro Matsumoto）个人开发者的一种跨平台、面向对象的动态类型编程语言。 Ruby 0.4.2之前版本存在安全漏洞，该漏洞源于Util#escapeElement方法中的正则表达式拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ruby-lang CGI 0 ~ 0.3.5.1 -

II. Public POCs for CVE-2025-27220

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III. Intelligence Information for CVE-2025-27220

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Vendor Advisories for CVE-2025-27220 (1)

Same Patch Batch · ruby-lang · 2025-03-03 · 3 CVEs total

CVE-2025-27219 5.8 MEDIUM Ruby 安全漏洞
CVE-2025-27221 3.2 LOW Ruby 安全漏洞

IV. Related Vulnerabilities

Same product: CGI
Same vendor: ruby-lang
Same weakness: CWE-1333

V. Comments for CVE-2025-27220

Anonymous User
2026-05-15 05:43:29

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Anonymous User
2026-05-15 05:43:31

test'

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