{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:zettlr:zettlr:1.8.7:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "1.8.7"
              },
              {
                "last_affected": "1.8.7"
              }
            ],
            "source": [
              "CPE_STRING",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0e80c56063884f769349cb21f0712b12e97f9d4b"
            },
            {
              "last_affected": "0e80c56063884f769349cb21f0712b12e97f9d4b"
            },
            {
              "fixed": "9fba1b08998c029dba9054e766e3c69c4a8028a6"
            }
          ],
          "repo": "https://github.com/zettlr/zettlr",
          "type": "GIT"
        }
      ],
      "versions": [
        "1.8.7"
      ]
    }
  ],
  "database_specific": {},
  "details": "No filtering of cross-site scripting (XSS) payloads in the markdown-editor in Zettlr 1.8.7 allows attackers to perform remote code execution via a crafted file.",
  "id": "CVE-2021-26835",
  "modified": "2026-07-08T05:36:53.620445189Z",
  "published": "2021-06-18T12:15:08.040Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/Zettlr/Zettlr/releases/tag/v1.8.9"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Zettlr/Zettlr/issues/1716"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}