A configuration issue was addressed with additional restrictions. This issue is fixed in iOS 17 and iPadOS 17, macOS Sonoma 14. An app may be able to access a user's Photos Library.
http://seclists.org/fulldisclosure/2023/Oct/8
http://seclists.org/fulldisclosure/2023/Oct/3
https://www.darkreading.com/vulnerabilities-threats/zero-click-rce-bug-macos-calendar-exposes-icloud-data
https://support.apple.com/en-us/HT213940
https://support.apple.com/en-us/HT213938
Source: Mitre, NVD
Published: 2023-09-27
Updated: 2023-10-12
Base Score: 2.1
Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N
Severity: Low
Base Score: 3.3
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
EPSS: 0.00066