CVE-2020-25739

MEDIUM

gon < 6.4.0 - Cross-Site Scripting via MultiJson Escape Mode Bypass

Title source: llm
STIX 2.1

Description

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.

References (3)

Core 3
Core References
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2020/09/msg00018.html
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4560-1/

Scores

CVSS v3 6.1
EPSS 0.0061
EPSS Percentile 69.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-79
Status published
Products (4)
canonical/ubuntu_linux 18.04
debian/debian_linux 9.0
gon_project/gon < 6.4.0
rubygems/gon 0 - 6.4.0RubyGems
Published Sep 23, 2020
Tracked Since Feb 18, 2026