{"schemaVersion":3,"id":"CVE-2023-49792","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. In Nextcloud Server prior to versions 26.0.9 and 27.1.4; as well as Nextcloud Enterprise Server prior to versions 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4; when a (reverse) proxy is configured as trusted proxy the server could be tricked into reading a wrong remote address for an attacker, allowing them executing authentication attempts than intended. Nextcloud Server versions 26.0.9 and 27.1.4 and Nextcloud Enterprise Server versions 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4 contain a patch for this issue. No known workarounds are available.","dates":{"published":"2023-12-22T16:31:17.833Z","modified":"2024-08-27T15:47:21.783Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01041,"percentile":0.63523,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.01041},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.01041,"percentile":0.63523}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01041,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","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