{"schemaVersion":3,"id":"CVE-2023-49791","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 an attacker manages to get access to an active session of another user via another way, they could delete and modify workflows by sending calls directly to the API bypassing the password confirmation shown in the UI. 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":"2023-12-22T16:26:28.076Z","modified":"2024-09-12T12:36:45.577Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.4,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.4,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.4,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00608,"percentile":0.48076,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00608},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00608,"percentile":0.48076}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00608,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00608,"percentile":0.48076}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-284","name":"Improper Access Control","description":"The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.","type":"weakness","status":"Incomplete","abstraction":"Pillar","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/284.html"},{"id":"CWE-287","name":"Improper Authentication","description":"When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/287.html"}],"affected":[{"vendor":"nextcloud","product":"nextcloud_server","name":"nextcloud server","label":"nextcloud_server","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 23.0.0, < 23.0.12.13","noFixRecorded":false,"fixedIn":null},{"text":"≥ 24.0.0, < 24.0.12.9","noFixRecorded":false,"fixedIn":null},{"text":"≥ 25.0.0, < 25.0.13.4","noFixRecorded":false,"fixedIn":null},{"text":"≥ 26.0.0, < 26.0.9","noFixRecorded":false,"fixedIn":null},{"text":"≥ 27.0.0, < 27.1.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 23.0.0, < 23.0.12.13 | ≥ 24.0.0, < 24.0.12.9 | ≥ 25.0.0, < 25.0.13.4 | ≥ 26.0.0, < 26.0.9 | ≥ 27.0.0, < 27.1.4","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"nextcloud","label":"Nextcloud","category":"server-app"}},"hubHref":"/vendor/nextcloud/nextcloud_server"},{"vendor":"nextcloud","product":"security-advisories","name":"security-advisories","label":"security-advisories","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 23.0.0, < 23.0.12.13","noFixRecorded":false,"fixedIn":null},{"text":"≥ 24.0.0, < 24.0.12.9","noFixRecorded":false,"fixedIn":null},{"text":"≥ 25.0.0, < 25.0.13.4","noFixRecorded":false,"fixedIn":null},{"text":"≥ 26.0.0, < 26.0.9","noFixRecorded":false,"fixedIn":null},{"text":"≥ 27.0.0, < 27.1.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 23.0.0, < 23.0.12.13 | ≥ 24.0.0, < 24.0.12.9 | ≥ 25.0.0, < 25.0.13.4 | ≥ 26.0.0, < 26.0.9 | ≥ 27.0.0, < 27.1.4","eol":null,"hubHref":"/vendor/nextcloud/security-advisories"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3f8p-6qww-2prr","label":"github.com/nextcloud/security-advisories/security/advisories/GHSA-3f8p-6qww-2prr","hostname":"github.com","tags":["X Refsource CONFIRM","Vendor Advisory"]},{"url":"https://github.com/nextcloud/server/pull/41520","label":"github.com/nextcloud/server/pull/41520","hostname":"github.com","tags":["X Refsource MISC","Patch"]},{"url":"https://hackerone.com/reports/2120667","label":"hackerone.com/reports/2120667","hostname":"hackerone.com","tags":["X Refsource MISC","Permissions Required"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2023-12-22T16:26:28.076Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-09-12T12:36:45.577Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":22,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T06:27:50.255Z","stale":false,"partial":false}}