CVE-2025-66549 (GCVE-0-2025-66549)

Vulnerability from cvelistv5 – Published: 2025-12-05 17:47 – Updated: 2025-12-08 19:54
VLAI
Title
Nextcloud Desktop discloses information when attempting to lock a file inside a end-to-end encrypted directory
Summary
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.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-08 19:53 UTC
CWE
  • CWE-209 - Generation of Error Message Containing Sensitive Information
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7734 records in the last 180 days details
Impacted products
Vendor Product Version CPE status
nextcloud security-advisories Affected: < 3.16.5
guessed Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-66549",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-08T19:53:50.667206Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-08T19:54:01.534Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "security-advisories",
          "vendor": "nextcloud",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.16.5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 2.4,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-209",
              "description": "CWE-209: Generation of Error Message Containing Sensitive Information",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-05T17:47:00.748Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h9xj-qh76-q3hw",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h9xj-qh76-q3hw"
        },
        {
          "name": "https://github.com/nextcloud/desktop/pull/8330",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nextcloud/desktop/pull/8330"
        },
        {
          "name": "https://github.com/nextcloud/desktop/commit/36d6c234d42b06a6f2e9de3e413a5c3c625edad6",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nextcloud/desktop/commit/36d6c234d42b06a6f2e9de3e413a5c3c625edad6"
        },
        {
          "name": "https://hackerone.com/reports/3159877",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://hackerone.com/reports/3159877"
        }
      ],
      "source": {
        "advisory": "GHSA-h9xj-qh76-q3hw",
        "discovery": "UNKNOWN"
      },
      "title": "Nextcloud Desktop discloses information when attempting to lock a file inside a end-to-end encrypted directory"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-66549",
    "datePublished": "2025-12-05T17:47:00.748Z",
    "dateReserved": "2025-12-04T15:52:26.550Z",
    "dateUpdated": "2025-12-08T19:54:01.534Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-66549",
      "date": "2026-10-23",
      "epss": "0.00297",
      "percentile": "0.21241"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "security-advisories",
                "vendor": "nextcloud",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 3.16.5"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:nextcloud:desktop:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "C180975D-B1CA-46EA-9CE3-5F037D2A988A",
                    "versionEndExcluding": "3.16.5",
                    "versionStartIncluding": "3.0.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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."
          },
          {
            "lang": "es",
            "value": "Nextcloud Desktop es el cliente de sincronizaci\u00f3n de escritorio para Nextcloud. Versiones anteriores a 3.16.5, cuando se intenta bloquear manualmente un archivo dentro de un directorio cifrado de extremo a extremo, la ruta del archivo se enviaba al servidor sin cifrar, lo que hac\u00eda posible que los administradores lo vieran en archivos de registro. Esta vulnerabilidad est\u00e1 corregida en 3.16.5."
          }
        ],
        "id": "CVE-2025-66549",
        "lastModified": "2026-10-15T21:10:00.327",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 2.4,
                "baseSeverity": "LOW",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "HIGH",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 0.9,
              "impactScore": 1.4,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 2.7,
                "baseSeverity": "LOW",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "HIGH",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 1.2,
              "impactScore": 1.4,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2025-66549",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-08T19:53:50.667206Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2025-12-05T18:15:58.133",
        "references": [
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Patch"
            ],
            "url": "https://github.com/nextcloud/desktop/commit/36d6c234d42b06a6f2e9de3e413a5c3c625edad6"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Issue Tracking"
            ],
            "url": "https://github.com/nextcloud/desktop/pull/8330"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h9xj-qh76-q3hw"
          },
          {
            "source": "security-advisories@github.com",
            "tags": [
              "Permissions Required",
              "Vendor Advisory"
            ],
            "url": "https://hackerone.com/reports/3159877"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-209"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2025-12-09T08:27:23+00:00",
      "cve": "CVE-2025-66549",
      "id": "CVE-2025-66549",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Nextcloud Desktop discloses information when attempting to lock a file inside a end-to-end encrypted directory",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-66549.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2025-66549",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-12-08T19:53:50.667206Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-12-08T19:53:53.654Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "security-advisories",
              "vendor": "nextcloud",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c 3.16.5"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "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."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 2.4,
                "baseSeverity": "LOW",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "HIGH",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N",
                "version": "3.1"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-209",
                  "description": "CWE-209: Generation of Error Message Containing Sensitive Information",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-12-05T17:47:00.748Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h9xj-qh76-q3hw",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h9xj-qh76-q3hw"
            },
            {
              "name": "https://github.com/nextcloud/desktop/pull/8330",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/nextcloud/desktop/pull/8330"
            },
            {
              "name": "https://github.com/nextcloud/desktop/commit/36d6c234d42b06a6f2e9de3e413a5c3c625edad6",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/nextcloud/desktop/commit/36d6c234d42b06a6f2e9de3e413a5c3c625edad6"
            },
            {
              "name": "https://hackerone.com/reports/3159877",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://hackerone.com/reports/3159877"
            }
          ],
          "source": {
            "advisory": "GHSA-h9xj-qh76-q3hw",
            "discovery": "UNKNOWN"
          },
          "title": "Nextcloud Desktop discloses information when attempting to lock a file inside a end-to-end encrypted directory"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2025-66549",
        "datePublished": "2025-12-05T17:47:00.748Z",
        "dateReserved": "2025-12-04T15:52:26.550Z",
        "dateUpdated": "2025-12-08T19:54:01.534Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
Events included in the timeline

Loading timeline…


    Loading…

    Loading…

    Loading…

    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.