ubuntu-cve-2025-66549
Vulnerability from osv_ubuntu
Published
2025-12-05 18:15
Modified
2026-04-22 07:56
Summary
Details

Nextcloud Desktop is the desktop sync client for Nextcloud. Prior to 3.16.5, when trying to manually lock a file inside an end-to-end encrypted directory, the path of the file was sent to the server unencrypted, making it possible for administrators to see it in log files. This vulnerability is fixed in 3.16.5.

Severity
2.4 (Low)
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N
2.7 (Low)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "caja-nextcloud",
            "binary_version": "2.6.2-1build1"
          },
          {
            "binary_name": "dolphin-nextcloud",
            "binary_version": "2.6.2-1build1"
          },
          {
            "binary_name": "libnextcloudsync0",
            "binary_version": "2.6.2-1build1"
          },
          {
            "binary_name": "nautilus-nextcloud",
            "binary_version": "2.6.2-1build1"
          },
          {
            "binary_name": "nemo-nextcloud",
            "binary_version": "2.6.2-1build1"
          },
          {
            "binary_name": "nextcloud-desktop",
            "binary_version": "2.6.2-1build1"
          },
          {
            "binary_name": "nextcloud-desktop-cmd",
            "binary_version": "2.6.2-1build1"
          },
          {
            "binary_name": "nextcloud-desktop-common",
            "binary_version": "2.6.2-1build1"
          },
          {
            "binary_name": "nextcloud-desktop-l10n",
            "binary_version": "2.6.2-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "nextcloud-desktop",
        "purl": "pkg:deb/ubuntu/nextcloud-desktop@2.6.2-1build1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.5.3-1",
        "2.6.0-1",
        "2.6.1-1",
        "2.6.1-2",
        "2.6.2-1",
        "2.6.2-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "caja-nextcloud",
            "binary_version": "3.4.2-1ubuntu1"
          },
          {
            "binary_name": "dolphin-nextcloud",
            "binary_version": "3.4.2-1ubuntu1"
          },
          {
            "binary_name": "libnextcloudsync0",
            "binary_version": "3.4.2-1ubuntu1"
          },
          {
            "binary_name": "nautilus-nextcloud",
            "binary_version": "3.4.2-1ubuntu1"
          },
          {
            "binary_name": "nemo-nextcloud",
            "binary_version": "3.4.2-1ubuntu1"
          },
          {
            "binary_name": "nextcloud-desktop",
            "binary_version": "3.4.2-1ubuntu1"
          },
          {
            "binary_name": "nextcloud-desktop-cmd",
            "binary_version": "3.4.2-1ubuntu1"
          },
          {
            "binary_name": "nextcloud-desktop-common",
            "binary_version": "3.4.2-1ubuntu1"
          },
          {
            "binary_name": "nextcloud-desktop-l10n",
            "binary_version": "3.4.2-1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "nextcloud-desktop",
        "purl": "pkg:deb/ubuntu/nextcloud-desktop@3.4.2-1ubuntu1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.2.3-0ubuntu1",
        "3.3.5-1",
        "3.3.5-1ubuntu1",
        "3.4.2-1",
        "3.4.2-1ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "caja-nextcloud",
            "binary_version": "3.11.0-1.1build4"
          },
          {
            "binary_name": "dolphin-nextcloud",
            "binary_version": "3.11.0-1.1build4"
          },
          {
            "binary_name": "libnextcloudsync0t64",
            "binary_version": "3.11.0-1.1build4"
          },
          {
            "binary_name": "nautilus-nextcloud",
            "binary_version": "3.11.0-1.1build4"
          },
          {
            "binary_name": "nemo-nextcloud",
            "binary_version": "3.11.0-1.1build4"
          },
          {
            "binary_name": "nextcloud-desktop",
            "binary_version": "3.11.0-1.1build4"
          },
          {
            "binary_name": "nextcloud-desktop-cmd",
            "binary_version": "3.11.0-1.1build4"
          },
          {
            "binary_name": "nextcloud-desktop-common",
            "binary_version": "3.11.0-1.1build4"
          },
          {
            "binary_name": "nextcloud-desktop-l10n",
            "binary_version": "3.11.0-1.1build4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "nextcloud-desktop",
        "purl": "pkg:deb/ubuntu/nextcloud-desktop@3.11.0-1.1build4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.9.0-1",
        "3.10.0-1",
        "3.11.0-1",
        "3.11.0-1.1build3",
        "3.11.0-1.1build4"
      ]
    }
  ],
  "aliases": [],
  "details": "Nextcloud Desktop is the desktop sync client for Nextcloud. Prior to 3.16.5, when trying to manually lock a file inside an end-to-end encrypted directory, the path of the file was sent to the server unencrypted, making it possible for administrators to see it in log files. This vulnerability is fixed in 3.16.5.",
  "id": "UBUNTU-CVE-2025-66549",
  "modified": "2026-04-22T07:56:56Z",
  "published": "2025-12-05T18:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-66549"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-66549"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h9xj-qh76-q3hw"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/nextcloud/desktop/pull/8330"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/nextcloud/desktop/commit/36d6c234d42b06a6f2e9de3e413a5c3c625edad6"
    },
    {
      "type": "REPORT",
      "url": "https://hackerone.com/reports/3159877"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-66549"
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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