CVE-2025-8533 | THREATINT

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.

PUBLISHED Reserved 2025-08-04 | Published 2025-08-07 | Updated 2025-08-07 | Assigner CERT-PL

MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-863 Incorrect Authorization

Product status

Default status

unaffected

Any version before 4.0.16

affected

Credits

Karol Mazurek - Afine Team finder

Sławomir Zakrzewski - Afine Team finder

References

cert.pl/en/posts/2025/08/CVE-2025-8533 third-party-advisory

flexibits.com/fantastical product

cve.org (CVE-2025-8533)

nvd.nist.gov (CVE-2025-8533)

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