{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "3.0.3"
              },
              {
                "fixed": "3.3.0"
              }
            ]
          },
          "events": [
            {
              "introduced": "78da725ac38e1508e5800d02fd1700a4e43b1088"
            },
            {
              "fixed": "acf3bf0959fc83393b71fbeed5b7633cab0f0d9d"
            }
          ],
          "repo": "https://github.com/nextcloud/desktop",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server with a computer. The Nextcloud Desktop Client invokes its uninstaller script when being installed to make sure there are no remnants of previous installations. In versions 3.0.3 through 3.2.4, the Client searches the `Uninstall.exe` file in a folder that can be written by regular users. This could lead to a case where a malicious user creates a malicious `Uninstall.exe`, which would be executed with administrative privileges on the Nextcloud Desktop Client installation. This issue is fixed in Nextcloud Desktop Client version 3.3.0. As a workaround, do not allow untrusted users to create content in the `C:\\` system folder and verify that there is no malicious `C:\\Uninstall.exe` file on the system.",
  "id": "CVE-2021-37617",
  "modified": "2026-03-13T21:48:46.667169016Z",
  "published": "2021-08-18T18:15:08.063Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q2w-v879-q24v"
    },
    {
      "type": "REPORT",
      "url": "https://hackerone.com/reports/1240749"
    },
    {
      "type": "FIX",
      "url": "https://github.com/nextcloud/desktop/pull/3497"
    }
  ],
  "related": [
    "GHSA-6q2w-v879-q24v"
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}