CVE intelligence and bounded remediation

CVE-2024-27794 — Claris Filemaker Server security vulnerability

Medium CVSS 6.1

Claris FileMaker Server before version 20.3.2 was susceptible to a reflected Cross-Site Scripting vulnerability due to an improperly handled parameter in the FileMaker WebDirect login endpoint. The vulnerability was resolved in FileMaker Server 20.3.2 by escaping the HTML contents of the login error message on the login page.

Severity
Medium
CVSS
6.1 (3.1)
Published
2024-04-15
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-79

Affected products

  • claris / filemaker_server

Matched remediation archetype

Cross-site scripting and unsafe browser output

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Check exposure

  • Trace reflected, stored, and DOM-derived untrusted values into HTML, attributes, URLs, styles, scripts, and client-side template sinks.
  • Identify affected origins, authenticated user roles, sensitive browser capabilities, and where content is shared across tenants.
  • Review framework escaping, rich-text sanitization, legacy templates, and client-side rendering paths.

Remediate safely

  • Use context-aware framework output encoding and safe DOM APIs; keep untrusted data out of executable contexts.
  • Sanitize intentionally supported markup with a maintained allowlist policy and validate URLs and attributes separately.
  • Update affected rendering components and add tests for every output context using inert sentinel markup.

Authoritative sources

Complete CVE record and remediation plan

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