Vulnerability Report

CVE-2025-27220

Title: Ruby-Lang Ruby Denial of Service (DoS)

DoS

Proof Of Concept

No public PoC currently indexed for CVE-2025-27220.

CWE Category CWE-1333
Published Date Mar 04, 2025
Modified Date Nov 03, 2025
Exploit Status Not Found
Score 4.0 CVSS v3.1
Exploit Probability (EPSS)
0.25%

Vulnerability Summary

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.

Impacted Vendors

Y
yukihiro_matsumoto 1
R
ruby-lang 2

Reference Links

https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2025-27220.yml https://hackerone.com/reports/2890322 https://lists.debian.org/debian-lts-announce/2025/03/msg00008.html
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
4.0
Attack Vector
NETWORK
Complexity
HIGH
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2025-27220 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

MODIFIED

Vulnerability data updated via NVD.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity HIGH
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L

Affected Stack

No specific products linked.