CVE-2023-45150

MEDIUM

Nextcloud Calendar < 4.4.4 - Denial of Service via Email Address Validation

Title source: llm
STIX 2.1

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.

References (3)

Core 3
Core References
Exploit, Issue Tracking x_refsource_misc
https://hackerone.com/reports/2058337

Scores

CVSS v3 4.3
EPSS 0.0039
EPSS Percentile 30.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-400 CWE-354
Status published
Products (1)
nextcloud/calendar 1.0 - 4.4.4
Published Oct 16, 2023
Tracked Since Feb 18, 2026