Security advisory

{
  "id": "42f2fb9b421806b17cf45c1236c6e1d2fbc65d9d6dd85238053694909e25941e",
  "url": "https://osv.dev/vulnerability/CVE-2020-9443",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-9443",
    "summary": "Zulip Desktop before 4.0.3 loaded untrusted content in an Electron webview with web security disabled, which can be exploited for XSS in a number of ways. This especially affects Zulip Desktop 2.3.82.",
    "evidence": "osv:CVE-2020-9443",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-9443",
      "aliases": [
        "CVE-2020-9443"
      ],
      "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/zulip/zulip-desktop",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "be869a52d5b6d59c0d75d818b69dc1b743cf2adb"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:zulipchat:zulip_desktop:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.0.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.0.2-beta",
            "v4.0.0",
            "v3.1.0-beta",
            "v3.0.0",
            "v2.5.0-beta",
            "v2.5.0",
            "v2.3.82",
            "v2.3.8",
            "v2.3.7-beta",
            "v2.3.6",
            "v2.3.5",
            "v2.3.4-beta",
            "v2.3.3",
            "v2.3.2",
            "v2.2.0-beta",
            "v2.0.0",
            "v1.9.0",
            "v1.8.2",
            "v1.8.1",
            "v1.7.0",
            "v1.6.0-beta",
            "v1.5.0",
            "v1.4.0",
            "v1.3.0-beta",
            "v1.2.0-beta",
            "v1.1.0-beta",
            "v1.0.0-beta",
            "v1.0.0",
            "v0.5.10",
            "v0.5.9",
            "v0.5.8",
            "v0.5.7",
            "v0.5.6",
            "v0.5.4",
            "v0.5.3",
            "v0.5.2",
            "v0.5.1",
            "v0.0.1-alpha"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-9443.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:43.996050915Z",
      "provider": "osv",
      "references": [
        "https://blog.zulip.org/2020/02/29/zulip-desktop-4-0-3-security-release/"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-9443",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 435768,
  "published_at": "2020-03-18T13:15:12.573+00:00"
}