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Vulnerabilities

Vulnerability · CVE-2025-8533

A vulnerability was identified in the XPC services of Fantastical.

Published Aug 7, 2025 · catalog updated Aug 7, 2025 · Flexibits Fantastical

Check this week

CVE-2025-8533 is not in CISA KEV. FIRST estimates a 39.00% chance of exploitation in the next 30 days. Check whether you run Flexibits Fantastical.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
39.00%
Remediation
Version ranges on file
Affected products
vendor Flexibits Fantastical 0 <4.0.16

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Flexibits Fantastical 0 <4.0.160 <4.0.16

How to fix CVE-2025-8533

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-8533 is not in CISA KEV. FIRST estimates a 39.00% chance of exploitation in the next 30 days. Check whether you run Flexibits Fantastical.

Which versions are affected?

Compare what you have installed with Flexibits Fantastical 0 <4.0.16 0 <4.0.16. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 39.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 7, 2025 · EUVD

    Detected

    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.

  2. Aug 7, 2025 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2025-8533

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2025-23914

    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

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Aug 7, 2025. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.