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The vulnerability of the Nextcloud calendar application, a cloud-based software for creating and using Nextcloud data storage, allows a perpetrator to gain unauthorized access to protected information.
🗓️ 25 Mar 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec🔗 bdu.fstec.ru👁 1 Views
| Reporter | Title | Published | Views | Family All 13 |
|---|---|---|---|---|
 | CVE-2025-66546 | 5 Dec 202514:50 | – | circl |
 | Nextcloud Calendar 安全漏洞 | 5 Dec 202500:00 | – | cnnvd |
 | CVE-2025-66546 | 5 Dec 202516:49 | – | cve |
 | CVE-2025-66546 Nextcloud Calendar app allowed booking appointments without the generated token | 5 Dec 202516:49 | – | cvelist |
 | EUVD-2025-201445 | 5 Dec 202516:49 | – | euvd |
 | Calendar app allowed booking appointments without the generated token | 5 Dec 202508:00 | – | nextcloud |
 | Nextcloud: Calendar app allowed booking appointments without the generated token | 29 Jul 202505:54 | – | hackerone |
 | CVE-2025-66546 | 5 Dec 202517:16 | – | nvd |
 | CVE-2025-66546 Nextcloud Calendar app allowed booking appointments without the generated token | 5 Dec 202516:49 | – | osv |
 | PT-2025-49289 | 5 Dec 202500:00 | – | ptsecurity |
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25 Mar 2026 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 21.7
CVSS 33.3
EPSS0.00118