CVE-2020-25739 — Vulnerability in gon — CVE Details

MEDIUM

Gon gem lack of escaping certain input when outputting as JSON

Published April 30, 2021Updated February 19, 2024Source: osv

Summary

An issue was discovered in the gon gem before gon-6.4.0 for Ruby. MultiJson does not honor the escape_mode parameter to escape fields as an XSS protection mechanism. To mitigate, json_dumper.rb in gon now does escaping for XSS by default without relying on MultiJson.

Advisory Timeline

First published April 30, 2021 (1991 days ago).
Last revised February 19, 2024 — 1024 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler

Update gon to 6.4.0 or later

gem install gon -v 6.4.0

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

Package	Ecosystem	Affected	Fixed In
gon	rubygems	0.1.0, 0.1.1, 0.2.0, 0.2.1 (+49 more)	6.4.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-79
Cross-site Scripting (XSS)MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 6.1 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

Frequently Asked Questions

What is CVE-2020-25739?: Gon gem lack of escaping certain input when outputting as JSON This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 6.1/10).
How do I check if my project is affected by CVE-2020-25739?: CVE-2020-25739 affects gon. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2020-25739 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

6.1

Exploitation requires specific conditions or has limited impact. Remediate within weeks.

Also Known As

GHSA-78vq-9j56-wrfr

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