CVE-2025-8533 json
Incorrect Authorization of XPC Service in Fantastical.app
published 2025-08-07 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-23914
- cvss
- 6.9
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 38%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Flexibits Fantastical 4.0.16
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 15 mo ago
Exploit prediction
0.45% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | 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 |
| CNA | 4.0 | 6.9 | 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 |
Affected products
- Flexibits Fantastical
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
cert.pl
/en/posts/2025/08/CVE-2025-8533
third-party-advisory
-
flexibits.com
/fantastical
product
Sources
- CVE List CVE-2025-8533
- NVD CVE-2025-8533
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