Security advisory

{
  "id": "7dffa626e40ee74b71f6488fe3993531eab25aaac930528c4c91542b66fdd1a7",
  "url": "https://osv.dev/vulnerability/CVE-2018-9986",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-9986",
    "summary": "In Zulip Server versions before 1.7.2, there were XSS issues with the frontend markdown processor.",
    "evidence": "osv:CVE-2018-9986",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2018-9986",
      "aliases": [
        "CVE-2018-9986"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/zulip/zulip",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "6bad5b661695f8796ce7e9a50f588b4da34e27c4"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.7.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.7.1",
            "1.7.0",
            "1.6.0",
            "1.5.0",
            "1.4.0",
            "1.3.13",
            "1.3.11",
            "1.3.10",
            "1.3.9",
            "1.3.8",
            "1.3.7",
            "1.3.6",
            "1.3.5",
            "1.3.4",
            "1.3.3",
            "1.3.2",
            "1.3.1",
            "1.3.0",
            "enterprise-1.2.0",
            "enterprise-1.1.5"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-9986.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:57.933204650Z",
      "provider": "osv",
      "references": [
        "https://blog.zulip.org/2018/04/12/zulip-1-7-2-released/"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-9986",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 438970,
  "published_at": "2018-04-18T08:29:00.703+00:00"
}