Vulnerability-Lookup

FKIE_CVE-2025-8533

Vulnerability from fkie_nvd - Published: 2025-08-07 10:15 - Updated: 2026-06-17 10:07

Severity

6.9 (Medium) - 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

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.

References

	URL	Tags
	cvd@cert.pl	https://cert.pl/en/posts/2025/08/CVE-2025-8533
	cvd@cert.pl	https://flexibits.com/fantastical

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "MacOS"
          ],
          "product": "Fantastical",
          "vendor": "Flexibits",
          "versions": [
            {
              "lessThan": "4.0.16",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "cvd@cert.pl"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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.\n\n\n\n\nThis issue has been resolved in version 4.0.16."
    },
    {
      "lang": "es",
      "value": "Se identific\u00f3 una vulnerabilidad en los servicios XPC de Fantastical. Estos servicios no implementaban las comprobaciones de autorizaci\u00f3n de cliente adecuadas en su m\u00e9todo listener:shouldAcceptNewConnection, aceptando incondicionalmente las solicitudes de cualquier proceso local. Como resultado, cualquier proceso local sin privilegios pod\u00eda conectarse al servicio XPC y acceder a sus m\u00e9todos. Este problema se ha resuelto en la versi\u00f3n 4.0.16."
    }
  ],
  "id": "CVE-2025-8533",
  "lastModified": "2026-06-17T10:07:10.233",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.9,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cvd@cert.pl",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-8533",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-08-07T13:27:30.634544Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-08-07T10:15:38.410",
  "references": [
    {
      "source": "cvd@cert.pl",
      "url": "https://cert.pl/en/posts/2025/08/CVE-2025-8533"
    },
    {
      "source": "cvd@cert.pl",
      "url": "https://flexibits.com/fantastical"
    }
  ],
  "sourceIdentifier": "cvd@cert.pl",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ],
      "source": "cvd@cert.pl",
      "type": "Secondary"
    }
  ]
}

CVE-2025-8533 (GCVE-0-2025-8533)

Vulnerability from cvelistv5 – Published: 2025-08-07 09:59 – Updated: 2025-08-07 13:27

Title

Incorrect Authorization of XPC Service in Fantastical.app

Summary

Severity

6.9 (Medium)


                        
                          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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-08-07 13:27 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

CERT-PL ENISA root

References

2 references

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

Impacted products

1 product

Vendor	Product	Version
Flexibits	Fantastical	Affected: 0 , < 4.0.16 (semver)

Date Public

2025-08-07 09:55

Credits

Karol Mazurek - Afine Team Sławomir Zakrzewski - Afine Team

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-8533",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-07T13:27:30.634544Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-08-07T13:27:42.989Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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      }
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    "cna": {
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          "platforms": [
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          "product": "Fantastical",
          "vendor": "Flexibits",
          "versions": [
            {
              "lessThan": "4.0.16",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
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      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Karol Mazurek - Afine Team"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "S\u0142awomir Zakrzewski - Afine Team"
        }
      ],
      "datePublic": "2025-08-07T09:55:00.000Z",
      "descriptions": [
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      ],
      "metrics": [
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            "Recovery": "NOT_DEFINED",
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            "vulnAvailabilityImpact": "NONE",
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          "scenarios": [
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      "problemTypes": [
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      "providerMetadata": {
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      },
      "references": [
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          "tags": [
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          "url": "https://cert.pl/en/posts/2025/08/CVE-2025-8533"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://flexibits.com/fantastical"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
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      "x_generator": {
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  "cveMetadata": {
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    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.