CVE-2025-66546
- Source
- https://cve.org/CVERecord?id=CVE-2025-66546
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-66546.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-66546
- Aliases
-
- GHSA-7x2j-2674-fj95
- Published
- 2025-12-05T16:49:46Z
- Modified
- 2026-08-12T03:51:27Z
- Severity
-
- 3.3 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
- Summary
- Nextcloud Calendar app allowed booking appointments without the generated token
- Details
-
Nextcloud Calendar is a calendar app for Nextcloud. Prior to 4.7.19, 5.5.6, and 6.0.1, the calendar app allowed blindly booking appointments with a squential ID without known the appointment token. This vulnerability is fixed in 4.7.19, 5.5.6, and 6.0.1.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-639" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66546.json" }- References
-
- https://hackerone.com/reports/3275810
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66546.json
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7x2j-2674-fj95
- https://nvd.nist.gov/vuln/detail/CVE-2025-66546
- https://github.com/nextcloud/calendar/commit/f41650c3681fc4a4130eb883f5c0899c011326b3
- https://github.com/nextcloud/calendar/pull/7537
Affected packages
Git / github.com/nextcloud/calendar
Affected ranges
- Type
- GIT
- Repo
- https://github.com/nextcloud/calendar
- Events
- Database specific
-
Show details
{ "cpe": [ "cpe:2.3:a:nextcloud:calendar:*:*:*:*:*:*:*:*", "cpe:2.3:a:nextcloud:calendar:6.0.0:-:*:*:*:*:*:*" ], "extracted_events": [ { "introduced": "4.0.0" }, { "fixed": "4.7.19" }, { "introduced": "5.0.0" }, { "fixed": "5.5.6" }, { "introduced": "6.0.0-NA" }, { "last_affected": "6.0.0-NA" } ], "source": [ "CPE_RANGE", "CPE_STRING", "REFERENCES" ] }