CVE-2025-66546 in Calendar

Résumé

par MITRE • 05/12/2025

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.

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• Responsable: GitHub M
• Réserver: 04/12/2025
• Divulgation: 05/12/2025
• Modérer: accepté
• Entrée: VDB-334518
• CPE: prêt
• CWE: CWE-639 (confirmé)
• CVSS: 3.3 (CNA)
• EPSS: 0.00123
• KEV: non
• Activités: très faible
• Secteur: Agriculture, Telecommunication, ...

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2025-66546
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-66546
• CVE Details: https://www.cvedetails.com/cve/CVE-2025-66546/