CVE-2025-8533

Incorrect Authorization of XPC Service in Fantastical.app

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.

Category

6.9
CVSS
Severity: Medium
CVSS 4.0 •
EPSS 0.04%
Third-Party Advisory cert.pl
Affected: Flexibits Fantastical
Published at:
Updated at:

References

Link Tags
https://cert.pl/en/posts/2025/08/CVE-2025-8533 third party advisory
https://flexibits.com/fantastical product

Frequently Asked Questions

What is the severity of CVE-2025-8533?
CVE-2025-8533 has been scored as a medium severity vulnerability.
How to fix CVE-2025-8533?
To fix CVE-2025-8533, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-8533 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-8533 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-8533?
CVE-2025-8533 affects Flexibits Fantastical.
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