What the vulnerability does
01Description
The Advanced Custom Fields: Font Awesome plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to and including 5.0.2. This is due to insufficient input validation of JSON field values and unsafe client-side HTML construction in the update_preview() JavaScript function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
02Summary
The Advanced Custom Fields: Font Awesome Field plugin for WordPress contains a cross-site scripting (XSS) vulnerability in versions up to 5.0.2. An authenticated user with low privileges can inject malicious scripts that execute in other users' browsers, including site administrators. The vulnerability has a changed scope, meaning the impact extends beyond the vulnerable component itself.
What an attacker can do
03Attacker Capabilities
Inject malicious JavaScript that runs in other users' browsers, potentially stealing session tokens or performing actions as those users.
Potential impact on your site
04Site Impact
Authenticated users can inject scripts affecting other site visitors and admins; could lead to account compromise or unauthorized site modifications.
Conditions required to exploit
05Prerequisites
Attacker must have a WordPress user account with low-level privileges (e.g., contributor or subscriber role).
Key dates
06Disclosure timeline
May 15, 2026
CVE published
May 15, 2026
Record updated
