CVE-2025-54940

Advanced Custom Fields <= 6.4.2. - HTML Injection

Severity Score

4.6

*CVSS v4

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

An HTML injection vulnerability exists in WordPress plugin "Advanced Custom Fields" prior to 6.4.3. If this vulnerability is exploited, crafted HTML code may be rendered and page display may be tampered.

Existe una vulnerabilidad de inyección HTML en el complemento de WordPress "Advanced Custom Fields" anterior a la versión 6.4.3. Si se explota esta vulnerabilidad, se podría renderizar código HTML manipulado y alterar la visualización de la página.

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.

*Credits: Shogo Kumamaru

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

High

User Interaction

Active

System

Vulnerable | Subsequent

Confidentiality

None

Integrity

None

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Multiple

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2025-08-01 CVE Reserved
2025-08-08 CVE Published
2025-08-14 EPSS Updated
2025-08-25 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-94: Improper Control of Generation of Code ('Code Injection')

CAPEC

References (2)

URL	Tag	Source
https://jvn.jp/en/jp/JVN21048820
https://www.advancedcustomfields.com/blog/acf-6-4-3-security-release

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
WPEngine, Inc. Search vendor "WPEngine, Inc."		Advanced Custom Fields Search vendor "WPEngine, Inc." for product "Advanced Custom Fields"				6.4.3 Search vendor "WPEngine, Inc." for product "Advanced Custom Fields" and version "6.4.3"		en		Affected