{"api_version":"1","generated_at":"2026-10-13T07:45:44+00:00","cve":"CVE-2025-66557","urls":{"html":"https://cve.report/CVE-2025-66557","api":"https://cve.report/api/cve/CVE-2025-66557.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-66557","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-66557"},"summary":{"title":"Nextcloud Deck app allowed user with \"Can share\" permission to modify permissions of other non-owners","description":"Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. Prior to 1.14.6 and 1.15.2, a bug in the permission logic allowed users with \"Can share\" permission to modify the permissions of other recipients. This vulnerability is fixed in 1.14.6 and 1.15.2.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2025-12-05 18:15:58","updated_at":"2026-09-25 23:10:00"},"problem_types":["CWE-284","NVD-CWE-noinfo","CWE-284 CWE-284: Improper Access Control"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"4.3","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","baseScore":4.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"}},{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","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","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","baseScore":5.4,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"LOW"}},{"version":"3.1","source":"CNA","type":"DECLARED","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","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","version":"3.1"}}],"references":[{"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wwr8-hx9g-rjvv","name":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wwr8-hx9g-rjvv","refsource":"security-advisories@github.com","tags":["Patch","Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/nextcloud/deck/commit/f1da8b30a455f02373d44154da04494c949a95ae","name":"https://github.com/nextcloud/deck/commit/f1da8b30a455f02373d44154da04494c949a95ae","refsource":"security-advisories@github.com","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/nextcloud/deck/pull/7131","name":"https://github.com/nextcloud/deck/pull/7131","refsource":"security-advisories@github.com","tags":["Issue Tracking","Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://hackerone.com/reports/3247499","name":"https://hackerone.com/reports/3247499","refsource":"security-advisories@github.com","tags":["Issue Tracking","Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-66557","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-66557","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"nextcloud","product":"security-advisories","version":"affected >= 1.15.0-beta.1, < 1.15.2","platforms":[]},{"source":"CNA","vendor":"nextcloud","product":"security-advisories","version":"affected < 1.14.6","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2025","cve_id":"66557","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"nextcloud","cpe5":"deck","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2025-66557","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2025-12-08T20:12:37.565515Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2025-12-08T20:12:45.372Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"security-advisories","vendor":"nextcloud","versions":[{"status":"affected","version":">= 1.15.0-beta.1, < 1.15.2"},{"status":"affected","version":"< 1.14.6"}]}],"descriptions":[{"lang":"en","value":"Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. Prior to 1.14.6 and 1.15.2, a bug in the permission logic allowed users with \"Can share\" permission to modify the permissions of other recipients. This vulnerability is fixed in 1.14.6 and 1.15.2."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-284","description":"CWE-284: Improper Access Control","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2025-12-05T17:28:48.642Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wwr8-hx9g-rjvv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wwr8-hx9g-rjvv"},{"name":"https://github.com/nextcloud/deck/pull/7131","tags":["x_refsource_MISC"],"url":"https://github.com/nextcloud/deck/pull/7131"},{"name":"https://github.com/nextcloud/deck/commit/f1da8b30a455f02373d44154da04494c949a95ae","tags":["x_refsource_MISC"],"url":"https://github.com/nextcloud/deck/commit/f1da8b30a455f02373d44154da04494c949a95ae"},{"name":"https://hackerone.com/reports/3247499","tags":["x_refsource_MISC"],"url":"https://hackerone.com/reports/3247499"}],"source":{"advisory":"GHSA-wwr8-hx9g-rjvv","discovery":"UNKNOWN"},"title":"Nextcloud Deck app allowed user with \"Can share\" permission to modify permissions of other non-owners"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2025-66557","datePublished":"2025-12-05T17:28:48.642Z","dateReserved":"2025-12-04T16:01:32.473Z","dateUpdated":"2025-12-08T20:12:45.372Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-12-05 18:15:58","lastModifiedDate":"2026-09-25 23:10:00","problem_types":["CWE-284","NVD-CWE-noinfo","CWE-284 CWE-284: Improper Access Control"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","baseScore":5.4,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"LOW"},"exploitabilityScore":2.8,"impactScore":2.5},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","baseScore":4.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2025-12-08T20:12:37.565515Z","id":"CVE-2025-66557","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:nextcloud:deck:*:*:*:*:*:*:*:*","versionStartIncluding":"1.14.0","versionEndExcluding":"1.14.6","matchCriteriaId":"29F12EA5-770A-4C40-A049-CA2EA77CE016"},{"vulnerable":true,"criteria":"cpe:2.3:a:nextcloud:deck:*:*:*:*:*:*:*:*","versionStartIncluding":"1.15.0","versionEndExcluding":"1.15.2","matchCriteriaId":"32A3D86C-1990-4E96-8027-AF235997BE7D"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2025","CveId":"66557","Ordinal":"1","Title":"Nextcloud Deck app allowed user with \"Can share\" permission to m","CVE":"CVE-2025-66557","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"66557","Ordinal":"1","NoteData":"Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. Prior to 1.14.6 and 1.15.2, a bug in the permission logic allowed users with \"Can share\" permission to modify the permissions of other recipients. This vulnerability is fixed in 1.14.6 and 1.15.2.","Type":"Description","Title":"Nextcloud Deck app allowed user with \"Can share\" permission to m"}]}}}