CVE-2023-30777 HIGH

CVE-2023-30777: WordPress Advanced Custom Fields / Advanced Custom Fields PRO plugins <= 6.1.5 vulnerable to Cross Site Scripting (XSS)

Vendor Wp Engine
Product Advanced Custom Fields Pro
Weakness CWE-79 · XSS
Published May 10, 2023
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

What the vulnerability does

01Description

Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in WP Engine Advanced Custom Fields Pro, WP Engine Advanced Custom Fields plugins <= 6.1.5 versions.

Explanation of Vulnerability in Simple Terms

02Summary

Advanced Custom Fields Pro versions up to 6.1.5 contain a stored cross-site scripting (XSS) vulnerability. An attacker can inject malicious scripts into custom field values that execute in the browsers of site administrators and other users who view the affected content. The vulnerability requires user interaction to trigger and can affect multiple users across the site.

What an attacker can do

03Attacker Capabilities

Inject malicious scripts that run in other users' browsers when they view affected custom field content.

Potential impact on your site

04Site Impact

Attackers can steal admin session tokens, modify site content, or perform actions as logged-in users who view the affected fields.

Conditions required to exploit

05Prerequisites

No authentication required, but a victim must visit a page containing the malicious payload.

Key dates

06Disclosure timeline

May 10, 2023 CVE published
April 28, 2026 Record updated

Related vulnerabilities

08Related CVE

CVE-2026-15665 Fluent Support <= 2.3.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'redirect-to' Shortcode Attribute CVE-2026-65483 WordPress HashThemes Demo Importer plugin <= 1.4.2 - Cross Site Scripting (XSS) vulnerability CVE-2026-15644 Powerkit <= 3.1.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'style' Shortcode Attribute CVE-2026-65440 WordPress GetGenie plugin <= 4.4.3 - Cross Site Scripting (XSS) vulnerability CVE-2026-15653 Visualizer <= 4.0.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'backend-title' Parameter