VULNERABILITY INTELLIGENCE

CVE-2023-45150

CVSS score4.3 MEDIUM

EPSS probability0.48%

CISA KEVNot currently listed

Published2023-10-16

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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.

Weakness classification

CWE-354: Improper Validation of Integrity Check Value
CWE-400: Uncontrolled Resource Consumption

Primary references

security-advisories@github.com — Patch
security-advisories@github.com — Vendor Advisory
security-advisories@github.com — Exploit, Issue Tracking
af854a3a-2127-422b-91ae-364da2661108 — Patch
af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Issue Tracking