CVE-2024-27790Public exploitNetwork attack vector

Unauthorized record access via unvalidated transactions

Published Apr 26, 2024 · Updated Aug 2, 2024

Authorization bypass in Claris FileMaker Server before 20.3.2 allows remote attackers to read records in hosted databases. The CORBA transaction flow continues database operations after a client-controlled proxy substitutes successful phase-two and phase-three replies for server errors. Only network access to the FileMaker service is required; the disclosed path enumerates database and user indexes before opening records without credentials.

CVSS severity7.5
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authorization bypass in Claris FileMaker Server before 20.3.2 allows remote attackers to read records in hosted databases. The CORBA transaction flow continues database operations after a client-controlled proxy substitutes successful phase-two and phase-three replies for server errors. Only network access to the FileMaker service is required; the disclosed path enumerates database and user indexes before opening records without credentials.

The record

CVE
CVE-2024-27790
Published
Apr 26, 2024
Updated
Aug 2, 2024
Vendor
Claris
Product
FileMaker Server
Classifications
CWE-284, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=*
  2. Affected versionversion=unspecified <20.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Claris · FileMaker Serverversion=*; version=unspecified <20.3.2

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo