{
  "document" : {
    "aggregate_severity" : {
      "text" : "mittel"
    },
    "category" : "csaf_base",
    "csaf_version" : "2.0",
    "distribution" : {
      "tlp" : {
        "label" : "WHITE",
        "url" : "https://www.first.org/tlp/"
      }
    },
    "lang" : "de-DE",
    "notes" : [ {
      "category" : "legal_disclaimer",
      "text" : "Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen."
    }, {
      "category" : "description",
      "text" : "Nextcloud ist eine \"on-premise\" Plattform für Dateifreigabe und Zusammenarbeit.",
      "title" : "Produktbeschreibung"
    }, {
      "category" : "summary",
      "text" : "Ein Angreifer kann mehrere Schwachstellen in Nextcloud ausnutzen, um einen Cross-Site Scripting Angriff durchzuführen, um Dateien zu manipulieren, und um Sicherheitsvorkehrungen zu umgehen.",
      "title" : "Angriff"
    }, {
      "category" : "general",
      "text" : "- Linux\n- Sonstiges\n- UNIX\n- Windows",
      "title" : "Betroffene Betriebssysteme"
    } ],
    "publisher" : {
      "category" : "other",
      "contact_details" : "csaf-provider@cert-bund.de",
      "name" : "Bundesamt für Sicherheit in der Informationstechnik",
      "namespace" : "https://www.bsi.bund.de"
    },
    "references" : [ {
      "category" : "self",
      "summary" : "WID-SEC-W-2025-2757 - CSAF Version",
      "url" : "https://wid.cert-bund.de/.well-known/csaf/white/2025/wid-sec-w-2025-2757.json"
    }, {
      "category" : "self",
      "summary" : "WID-SEC-2025-2757 - Portal Version",
      "url" : "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2025-2757"
    }, {
      "category" : "external",
      "summary" : "Nextcloud Security Advisory vom 2025-12-07",
      "url" : "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pr9f-vqgg-m2jh"
    }, {
      "category" : "external",
      "summary" : "Nextcloud Security Advisory vom 2025-12-07",
      "url" : "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fr8x-mvjg-wf9q"
    }, {
      "category" : "external",
      "summary" : "Nextcloud Security Advisory vom 2025-12-07",
      "url" : "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-9v78-cpfc-v6h2"
    }, {
      "category" : "external",
      "summary" : "Nextcloud Security Advisory vom 2025-12-07",
      "url" : "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wwr8-hx9g-rjvv"
    } ],
    "source_lang" : "en-US",
    "title" : "Nextcloud (Contacts, Talk, Deck und Twofactor WebAuthn): Mehrere Schwachstellen",
    "tracking" : {
      "current_release_date" : "2025-12-07T23:00:00.000+00:00",
      "generator" : {
        "date" : "2025-12-08T10:55:03.508+00:00",
        "engine" : {
          "name" : "BSI-WID",
          "version" : "1.5.0"
        }
      },
      "id" : "WID-SEC-W-2025-2757",
      "initial_release_date" : "2025-12-07T23:00:00.000+00:00",
      "revision_history" : [ {
        "date" : "2025-12-07T23:00:00.000+00:00",
        "number" : "1",
        "summary" : "Initiale Fassung"
      } ],
      "status" : "final",
      "version" : "1"
    }
  },
  "product_tree" : {
    "branches" : [ {
      "branches" : [ {
        "branches" : [ {
          "category" : "product_version_range",
          "name" : "Deck <1.14.6",
          "product" : {
            "name" : "Nextcloud Nextcloud Deck <1.14.6",
            "product_id" : "T049175"
          }
        }, {
          "category" : "product_version",
          "name" : "Deck 1.14.6",
          "product" : {
            "name" : "Nextcloud Nextcloud Deck 1.14.6",
            "product_id" : "T049175-fixed",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:nextcloud:nextcloud:deck__1.14.6"
            }
          }
        }, {
          "category" : "product_version_range",
          "name" : "Deck <1.15.2",
          "product" : {
            "name" : "Nextcloud Nextcloud Deck <1.15.2",
            "product_id" : "T049176"
          }
        }, {
          "category" : "product_version",
          "name" : "Deck 1.15.2",
          "product" : {
            "name" : "Nextcloud Nextcloud Deck 1.15.2",
            "product_id" : "T049176-fixed",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:nextcloud:nextcloud:deck__1.15.2"
            }
          }
        }, {
          "category" : "product_version_range",
          "name" : "Contacts <5.5.4",
          "product" : {
            "name" : "Nextcloud Nextcloud Contacts <5.5.4",
            "product_id" : "T049177"
          }
        }, {
          "category" : "product_version",
          "name" : "Contacts 5.5.4",
          "product" : {
            "name" : "Nextcloud Nextcloud Contacts 5.5.4",
            "product_id" : "T049177-fixed",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:nextcloud:nextcloud:contacts__5.5.4"
            }
          }
        }, {
          "category" : "product_version_range",
          "name" : "Contacts <6.0.6",
          "product" : {
            "name" : "Nextcloud Nextcloud Contacts <6.0.6",
            "product_id" : "T049178"
          }
        }, {
          "category" : "product_version",
          "name" : "Contacts 6.0.6",
          "product" : {
            "name" : "Nextcloud Nextcloud Contacts 6.0.6",
            "product_id" : "T049178-fixed",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:nextcloud:nextcloud:contacts__6.0.6"
            }
          }
        }, {
          "category" : "product_version_range",
          "name" : "Contacts <7.2.5",
          "product" : {
            "name" : "Nextcloud Nextcloud Contacts <7.2.5",
            "product_id" : "T049179"
          }
        }, {
          "category" : "product_version",
          "name" : "Contacts 7.2.5",
          "product" : {
            "name" : "Nextcloud Nextcloud Contacts 7.2.5",
            "product_id" : "T049179-fixed",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:nextcloud:nextcloud:contacts__7.2.5"
            }
          }
        }, {
          "category" : "product_version_range",
          "name" : "Twofactor WebAuthn <1.4.2",
          "product" : {
            "name" : "Nextcloud Nextcloud Twofactor WebAuthn <1.4.2",
            "product_id" : "T049180"
          }
        }, {
          "category" : "product_version",
          "name" : "Twofactor WebAuthn 1.4.2",
          "product" : {
            "name" : "Nextcloud Nextcloud Twofactor WebAuthn 1.4.2",
            "product_id" : "T049180-fixed",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:nextcloud:nextcloud:twofactor_webauthn__1.4.2"
            }
          }
        }, {
          "category" : "product_version_range",
          "name" : "Twofactor WebAuthn <2.4.1",
          "product" : {
            "name" : "Nextcloud Nextcloud Twofactor WebAuthn <2.4.1",
            "product_id" : "T049181"
          }
        }, {
          "category" : "product_version",
          "name" : "Twofactor WebAuthn 2.4.1",
          "product" : {
            "name" : "Nextcloud Nextcloud Twofactor WebAuthn 2.4.1",
            "product_id" : "T049181-fixed",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:nextcloud:nextcloud:twofactor_webauthn__2.4.1"
            }
          }
        }, {
          "category" : "product_version_range",
          "name" : "Talk <20.1.8",
          "product" : {
            "name" : "Nextcloud Nextcloud Talk <20.1.8",
            "product_id" : "T049182"
          }
        }, {
          "category" : "product_version",
          "name" : "Talk 20.1.8",
          "product" : {
            "name" : "Nextcloud Nextcloud Talk 20.1.8",
            "product_id" : "T049182-fixed",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:nextcloud:nextcloud:talk__20.1.8"
            }
          }
        }, {
          "category" : "product_version_range",
          "name" : "Talk <21.1.2",
          "product" : {
            "name" : "Nextcloud Nextcloud Talk <21.1.2",
            "product_id" : "T049183"
          }
        }, {
          "category" : "product_version",
          "name" : "Talk 21.1.2",
          "product" : {
            "name" : "Nextcloud Nextcloud Talk 21.1.2",
            "product_id" : "T049183-fixed",
            "product_identification_helper" : {
              "cpe" : "cpe:/a:nextcloud:nextcloud:talk__21.1.2"
            }
          }
        } ],
        "category" : "product_name",
        "name" : "Nextcloud"
      } ],
      "category" : "vendor",
      "name" : "Nextcloud"
    } ]
  },
  "vulnerabilities" : [ {
    "cve" : "CVE-2025-66554",
    "product_status" : {
      "known_affected" : [ "T049179", "T049178", "T049177" ]
    },
    "release_date" : "2025-12-07T23:00:00.000+00:00",
    "title" : "CVE-2025-66554"
  }, {
    "cve" : "CVE-2025-66556",
    "product_status" : {
      "known_affected" : [ "T049183", "T049182" ]
    },
    "release_date" : "2025-12-07T23:00:00.000+00:00",
    "title" : "CVE-2025-66556"
  }, {
    "cve" : "CVE-2025-66557",
    "product_status" : {
      "known_affected" : [ "T049176", "T049175" ]
    },
    "release_date" : "2025-12-07T23:00:00.000+00:00",
    "title" : "CVE-2025-66557"
  }, {
    "cve" : "CVE-2025-66558",
    "product_status" : {
      "known_affected" : [ "T049181", "T049180" ]
    },
    "release_date" : "2025-12-07T23:00:00.000+00:00",
    "title" : "CVE-2025-66558"
  } ]
}