Description
A vulnerability was identified in the XPC services of Fantastical. The services failed to implement proper client authorization checks in its listener:shouldAcceptNewConnection method, unconditionally accepting requests from any local process. As a result, any local, unprivileged process could connect to the XPC service and access its methods. This issue has been resolved in version 4.0.16.
References (2)
Core 2
Core References
Various Sources product
https://flexibits.com/fantastical
Various Sources third-party-advisory
https://cert.pl/en/posts/2025/08/CVE-2025-8533
Scores
CVSS v4
6.9
EPSS
0.0037
EPSS Percentile
28.1%
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-863
Status
published
Products (1)
Flexibits/Fantastical
< 4.0.16
Published
Aug 07, 2025
Tracked Since
Feb 18, 2026