Security advisory

{
  "id": "1dfb913ca6c6783019a48acb59cbddec1ebe49278c6550ea03e36be0a099de33",
  "url": "https://osv.dev/vulnerability/CVE-2020-25739",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-25739",
    "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.",
    "evidence": "osv:CVE-2020-25739",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-25739",
      "aliases": [
        "CVE-2020-25739",
        "GHSA-78vq-9j56-wrfr"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/gazay/gon",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "fe3c7b2191a992386dc9edd37de5447a4e809bc7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gon_project:gon:*:*:*:*:*:ruby:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "6.4.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "fe3c7b2191a992386dc9edd37de5447a4e809bc7"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v6.3.2",
            "v6.3.1",
            "v6.2.1",
            "v6.2.0",
            "v6.1.0",
            "v6.0.1",
            "v6.0.0",
            "v5.2.3",
            "v5.2.2",
            "v5.2.1",
            "v5.2.0",
            "v5.1.2",
            "v5.1.1",
            "v5.1.0",
            "v5.0.4",
            "v5.0.3",
            "v5.0.2",
            "v5.0.1",
            "v5.0.0",
            "v4.1.1",
            "v4.1.0",
            "v4.0.3",
            "v4.0.2",
            "v4.0.1",
            "v4.0.0beta",
            "v3.0.5",
            "v3.0.4",
            "v3.0.3",
            "v3.0.2",
            "v3.0.0",
            "v2.3.0",
            "v2.2.2",
            "v2.2.0",
            "v2.1.2",
            "v2.1.0",
            "v2.0.6",
            "v2.0.5",
            "v2.0.4",
            "v2.0.3",
            "v2.0.2",
            "v2.0.1",
            "v2.0.0",
            "v1.1.3",
            "v1.1.2",
            "v1.1.1",
            "v1.1.0",
            "v1.0.0",
            "v0.3.0",
            "v0.2.2",
            "v0.2.1",
            "v0.2.0",
            "v0.1.1",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-25739.json"
          }
        }
      ],
      "modified": "2026-10-20T10:52:54.292703116Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2020/09/msg00018.html",
        "https://usn.ubuntu.com/4560-1/",
        "https://github.com/gazay/gon/commit/fe3c7b2191a992386dc9edd37de5447a4e809bc7"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*"
            ],
            "vendor_product": "canonical:ubuntu_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "18.04"
                  },
                  {
                    "last_affected": "18.04"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "9.0"
                  },
                  {
                    "last_affected": "9.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-25739",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384017,
  "published_at": "2020-09-23T14:15:12.947+00:00"
}