Advanced Custom Fields <= 6.4.2. - HTML Injection

Improper Input Validation
CVE CVE-2025-54940
CVSS Medium (4.1)
Publicly Published August 8, 2025
Last Updated August 25, 2025
Researcher Shogo Kumamaru
Description

The Advanced Custom Fields (ACF®) plugin for WordPress is vulnerable to HTML Injection in all versions up to, and including, 6.4.2. This is due to the plugin nor properly neutralizing unsafe HTML. This makes it possible for authenticated attackers, with administrator-level access and above, to inject potentially malicious HTML.

References

1 affected software package

Software Type Plugin
Software Slug advanced-custom-fields (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 6.4.2
Patched Version
  • 6.4.3
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