CVE-2026-6415 Cross-site scripting in Advanced Custom Fields: Font Awesome Field
Authenticated attackers can inject arbitrary scripts via JSON fields, leading to stored XSS execution for other users.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-6415?
CVE-2026-6415 is a medium-severity cross-site scripting vulnerability in justinkruit Advanced Custom Fields: Font Awesome Field, published on 15 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-6415?
How do I fix CVE-2026-6415?
No fix has been published for CVE-2026-6415 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-6415 being exploited?
There is no known exploitation of CVE-2026-6415 in the wild and no public exploit code.
Sources
Also known as GHSA-59fm-cmjw-gc79.