3.3Low
CVE-2025-66546Nextcloud Calendar app allowed booking appointments without the generated token
Description
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.
Weakness (CWE):
CWE-639
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| nextcloud | calendar | 4.0.0 – < 4.7.19 | |
| nextcloud | security-advisories | >= 6.0.0-rc.1, < 6.0.1, >= 5.0.0-rc.1, < 5.5.6, >= 3.0.0-beta1, < 4.7.19 |
References and patches
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7x2j-2674-fj95 PatchVendor Advisory
- https://github.com/nextcloud/calendar/pull/7537 Issue Tracking
- https://github.com/nextcloud/calendar/commit/f41650c3681fc4a4130eb883f5c0899c011326b3 Patch
- https://hackerone.com/reports/3275810 Issue TrackingVendor Advisory
CPE matches (NVD) (9)
cpe:2.3:a:nextcloud:calendar:*:*:*:*:*:*:*:*≥ 4.0.0 < 4.7.19cpe:2.3:a:nextcloud:calendar:*:*:*:*:*:*:*:*≥ 5.0.0 < 5.5.6cpe:2.3:a:nextcloud:calendar:6.0.0:-:*:*:*:*:*:*cpe:2.3:a:nextcloud:calendar:6.0.0:rc1:*:*:*:*:*:*cpe:2.3:a:nextcloud:calendar:6.0.0:rc2:*:*:*:*:*:*cpe:2.3:a:nextcloud:calendar:6.0.0:rc3:*:*:*:*:*:*cpe:2.3:a:nextcloud:calendar:6.0.0:rc4:*:*:*:*:*:*cpe:2.3:a:nextcloud:calendar:6.0.0:rc5:*:*:*:*:*:*cpe:2.3:a:nextcloud:calendar:6.0.0:rc6:*:*:*:*:*:*