{"cve":"CVE-2020-25739","nvd":{"published":"2020-09-23T14:15:12.947","modified":"2026-06-17T03:07:13.263","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://github.com/gazay/gon/commit/fe3c7b2191a992386dc9edd37de5447a4e809bc7","https://lists.debian.org/debian-lts-announce/2020/09/msg00018.html","https://usn.ubuntu.com/4560-1/","https://github.com/gazay/gon/commit/fe3c7b2191a992386dc9edd37de5447a4e809bc7","https://lists.debian.org/debian-lts-announce/2020/09/msg00018.html"],"products":["canonical:ubuntu_linux","debian:debian_linux","gon_project:gon"],"source":"nvd","synced_at":"2026-10-19T21:09:53.489947993+00:00"},"epss":{"cve":"CVE-2020-25739","score":0.01376,"percentile":0.72053,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-78vq-9j56-wrfr","url":"https://osv.dev/vulnerability/GHSA-78vq-9j56-wrfr","summary":"Gon gem lack of escaping certain input when outputting as JSON","modified":"2024-02-19T05:28:55.784562Z","packages":[{"ecosystem":"RubyGems","name":"gon","purl":"pkg:gem/gon","ranges":["<6.4.0"],"fixed":["6.4.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}