Flexibits Fantastical up to 4.0.15 XPC Service authorization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Flexibits Fantastical up to 4.0.15. Impacted is an unknown function of the component XPC Service. Executing a manipulation can lead to authorization. This vulnerability is handled as CVE-2025-8533. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Flexibits Fantastical up to 4.0.15 and classified as critical. This vulnerability affects an unknown part of the component XPC Service. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was released with Karol Mazurek/Sławomir Zakrzewski. The advisory is available at cert.pl. This vulnerability was named CVE-2025-8533 since 08/04/2025. The exploitation appears to be easy. The attack can be initiated remotely. The technical details are unknown and an exploit is not available.

Upgrading to version 4.0.16 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Authorization
CWE: CWE-863 / CWE-285 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Fantastical 4.0.16

Timelineinfo

08/04/2025 CVE reserved
08/07/2025 +3 days Advisory disclosed
08/07/2025 +0 days VulDB entry created
08/07/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: cert.pl
Organization: Karol Mazurek/Sławomir Zakrzewski
Status: Confirmed

CVE: CVE-2025-8533 (🔒)
GCVE (CVE): GCVE-0-2025-8533
GCVE (VulDB): GCVE-100-319126

Entryinfo

Created: 08/07/2025 12:49
Changes: 08/07/2025 12:49 (67)
Complete: 🔍
Cache ID: 216::103

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