# CVE-2020-25739: ruby-gon: An issue was discovered in the gon gem before gon-6.4.0 for Ruby

CVE-2020-25739 is fixed in ruby-gon on 1 platform by ruby-gon 6.1.0-1+deb9u1build0.18.04.1 (version 6.1.0-1+deb9u1build0.18.04.1), released September 23, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-25739
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0138
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 23, 2020

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | ruby-gon Ubuntu 18.04.6 LTS (bionic) | 6.1.0-1+deb9u1build0.18.04.1 | [ruby-gon 6.1.0-1+deb9u1build0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ruby-gon-6.1.0-1-deb9u1build0.18.04.1.md) | Sep 23, 2020 |

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