Advanced Custom Fields <= 6.4.2. - HTML Injection

2025-08-08 00:00

Shogo Kumamaru

Strategic Overview

Status

Patched in 6.4.3

Affected PluginAdvanced Custom Fields (ACF®)

Affected Version<= 6.4.2

CVSS4.1Medium

CVECVE-2025-54940

View all Advanced Custom Fields (ACF®) vulnerabilities

Vulnerability Overview

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.

Technical Analysis

REMEDIATION: Update to version 6.4.3, or a newer patched version --- IDENTIFIER: CWE-20 (Improper Input Validation) The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

External References

https://www.cve.org/CVERecord?id=CVE-2025-54940 https://www.wordfence.com/threat-intel/vulnerabilities/id/0f5a48ec-da62-4a9d-a8a5-30da7b6d23f6

CVSS Vector

4.1

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredHigh
User InteractionNone
ScopeChanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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