CVE Explorer
CVE-2026-45281
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, with the knowledge of other users’ principal URL an attacker could possibly send a request to gain full access to their calendar. Therefore, the attacker must be an authenticated user. This is because of improper authorization controls in the backend of the calendar. If the attacker had access to the calendar, they would be able to view and modify it
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"security-advisories","vendor":"nextcloud","versions":[{"status":"affected","version":">= 32.0.0, < 32.0.9"},{"status":"affected","version":">= 33.0.0, < 33.0.3"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:2de46b64e8c853bef5a958a5ababf547a9720f00221f06e86af9d1d2d9d988a2 · sha256:562a41333ecba68c… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:2de46b64e8c853bef5a958a5ababf547a9720f00221f06e86af9d1d2d9d988a2 · sha256:562a41333ecba68c… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:2de46b64e8c853bef5a958a5ababf547a9720f00221f06e86af9d1d2d9d988a2 · sha256:562a41333ecba68c… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"name":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hrrv-mp25-26vv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hrrv-mp25-26vv"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2de46b64e8c853bef5a958a5ababf547a9720f00221f06e86af9d1d2d9d988a2 · sha256:562a41333ecba68c… · /containers/cna/references/0
{"name":"https://github.com/nextcloud/server/pull/59962","tags":["x_refsource_MISC"],"url":"https://github.com/nextcloud/server/pull/59962"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2de46b64e8c853bef5a958a5ababf547a9720f00221f06e86af9d1d2d9d988a2 · sha256:562a41333ecba68c… · /containers/cna/references/1
{"name":"https://hackerone.com/reports/3545964","tags":["x_refsource_MISC"],"url":"https://hackerone.com/reports/3545964"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2de46b64e8c853bef5a958a5ababf547a9720f00221f06e86af9d1d2d9d988a2 · sha256:562a41333ecba68c… · /containers/cna/references/2
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.