What’s Vulnerable › Vulnerabilities

CVE-2026-6415: Advanced Custom Fields: Font Awesome Field <= 5.0.2 - Authenticated (Subscriber+) Stored Cross-Site Scripting via JSON Field

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-15 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• justinkruit Advanced Custom Fields: Font Awesome Field: through 5.0.2

References

• https://plugins.trac.wordpress.org/browser/advanced-custom-fields-font-awesome/tags/5.0.2/assets/js/input-v6.js#L11
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields-font-awesome/tags/5.0.2/assets/js/input-v6.js#L12
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields-font-awesome/trunk/assets/js/input-v6.js#L11
• https://plugins.trac.wordpress.org/browser/advanced-custom-fields-font-awesome/trunk/assets/js/input-v6.js#L12
• https://plugins.trac.wordpress.org/changeset/3525840/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/a7a53ba2-e983-4821-b3de-105a96b7cb0e?source=cve

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