CVE-2026-6415 json
Advanced Custom Fields: Font Awesome Field <= 5.0.2 - Authenticated (Subscriber+) Stored Cross-Site Scripting via JSON Field
published 2026-05-15 5 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-30521
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 19%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- justinkruit Advanced Custom Fields: Font Awesome Field
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/a7a53ba2-e983-4821-b3de-105a96b7cb0e?source=cve
- plugins.trac.wordpress.org /browser/advanced-custom-fields-font-awesome/trunk/assets/js/input-v6.js#L11
- plugins.trac.wordpress.org /browser/advanced-custom-fields-font-awesome/tags/5.0.2/assets/js/input-v6.js#L11
- plugins.trac.wordpress.org /browser/advanced-custom-fields-font-awesome/trunk/assets/js/input-v6.js#L12
- plugins.trac.wordpress.org /browser/advanced-custom-fields-font-awesome/tags/5.0.2/assets/js/input-v6.js#L12
- plugins.trac.wordpress.org /changeset/3525840/
Sources
- CVE List CVE-2026-6415
- NVD CVE-2026-6415
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.