Security advisory

{
  "id": "22394ef65285442ef60ab50d59a982747a734e2c0331cf539ad19d457f007f57",
  "url": "https://osv.dev/vulnerability/CVE-2021-26834",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-26834",
    "summary": "A cross-site scripting (XSS) vulnerability exists in Znote 0.5.2. An attacker can insert payloads, and the code execution will happen immediately on markdown view mode.",
    "evidence": "osv:CVE-2021-26834",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-26834",
      "aliases": [
        "CVE-2021-26834"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/alagrede/znote-app",
              "type": "GIT",
              "events": [
                {
                  "introduced": "954868380f58c2441c96804b1db375cf20b3d9dc"
                },
                {
                  "last_affected": "954868380f58c2441c96804b1db375cf20b3d9dc"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:znote:znote:0.5.2:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.5.2"
                      },
                      {
                        "last_affected": "0.5.2"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.5.2",
            "v1.4.2",
            "v1.4.1",
            "v1.4.0",
            "v1.3.2",
            "v1.3.1",
            "v1.2.0",
            "v1.1.9",
            "v0.6.5",
            "v0.6.3",
            "v0.6.2",
            "v0.6.1",
            "v0.6.0",
            "v0.5.3",
            "v0.5.2",
            "v0.5.0",
            "v0.4.1",
            "v0.4.0",
            "v0.3.9"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-26834.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:34.851944357Z",
      "provider": "osv",
      "references": [
        "https://www.electronjs.org/apps/znote",
        "https://github.com/alagrede/znote-app/issues/5"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-26834",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385647,
  "published_at": "2021-06-18T12:15:08.007+00:00"
}