CVE-2025-54940

Advanced Custom Fields <= 6.4.2. - HTML Injection

mediumImproper Input Validation

4.1

CVSS Score

4.1

CVSS Score

medium

Severity

6.4.3

Patched in

18d

Time to patch

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.

CVSS Vector Breakdown

CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

None

Confidentiality

Low

Integrity

None

Availability

Technical Details

Affected versions<=6.4.2

PublishedAugust 8, 2025

Last updatedAugust 25, 2025

Affected pluginadvanced-custom-fields

References

https://www.wordfence.com/threat-intel/vulnerabilities/id/0f5a48ec-da62-4a9d-a8a5-30da7b6d23f6?source=api-prod

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