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CA
Product
Calendar
by Nextcloud · last CVE Jun 1, 2026
10
CVEs
0
On KEV
9.8
Max CVSS
0
New 30D
Vulnerabilities10In the news0Timeline
Severity mix
Critical 1High 0Medium 8Low 1
Severity
All severities10Critical1High0Medium8Low1
Exploitation
On CISA KEV0Exploited in the wild0
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CVECVSSEPSSPublishedSummary · affected versions
CVE-2025-66511
6.5
0%
Dec 5
Nextcloud Calendar app used predictable proposal participant tokens
Affected: 6.0.0 before 6.0.3
CVE-2023-48308
6.5
1%
Dec 22
Nextcloud/Cloud is a calendar app for Nextcloud
Affected: 3.0.0 before 4.5.3
CVE-2025-66550
5.7
0%
Dec 5
Nextcloud Calendar attachments of local files are offered to downloaded
Affected: 4.0.0 before 4.7.17; 5.0.0 before 5.2.4
CVE-2018-3763
4.8
1%
Jul 5
In Nextcloud Calendar before 1.5.8 and 1.6.1, a missing sanitization of search results for an autocomplete field could lead to a stored XSS requiring user-interaction
Affected: before 1.5.8; 1.6.0
CVE-2024-37316
4.6
0%
Jun 14
Nextcloud Calendar is a calendar app for Nextcloud
Affected: 4.3.0 before 4.6.8
CVE-2026-45286
4.3
0%
Jun 1
Nextcloud: Calendar app leaked user identifiers via attendee suggestion endpoint
Affected: 5.5.13 before 5.5.17; 6.2.0 before 6.2.3
CVE-2023-45150
4.3
0%
Oct 16
Nextcloud calendar is a calendar app for the Nextcloud server platform
Affected: 1.0 before 4.4.4
CVE-2023-33183
4.3
0%
May 30
Calendar app for Nextcloud easily sync events from various devices with your Nextcloud
Affected: before 3.5.5; 4.0.0 before 4.2.3
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