CVE-2023-45150

Inviting excessive long email addresses to a calendar event makes the Nextcloud server unresponsive

Published Oct 16, 2023 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Description
Nextcloud calendar is a calendar app for the Nextcloud server platform. Due to missing precondition checks the server was trying to validate strings of any length as email addresses even when megabytes of data were provided, eventually making the server busy and unresponsive. It is recommended that the Nextcloud Calendar app is upgraded to 4.4.4. The only workaround for users unable to upgrade is to disable the calendar app.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-49457 Nextcloud calendar is a calendar app for the Nextcloud server platform. Due to missing precondition checks the server was trying to validate strings of any length as email addresses even when megabytes of data were provided, eventually making the server busy and unresponsive. It is recommended that the Nextcloud Calendar app is upgraded to 4.4.4. The only workaround for users unable to upgrade is to disable the calendar app.
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 16, 2024, 2:31 PM
Reserved
Oct 4, 2023, 4:02 PM
Status
Modified
Published
Oct 16, 2023, 8:15 PM
Modified
Jun 17, 2026, 6:28 AM