CVE-2026-109216 Meta Box <= 5.15.2 - Authenticated (Subscriber+) Stored Cross-Site Scripting via Background Field Array Keys
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-109216?
CVE-2026-109216 is a medium-severity vulnerability in metabox Meta Box – A Framework for Dynamic Websites, published on 29 Oct 2026.
Official description
The Meta Box – A Framework for Dynamic Websites plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'profile_background[<attacker-chosen key>]' parameter in all versions up to, and including, 5.15.2 due to insufficient input sanitization and output escaping. 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. Exploitability depends on a consuming plugin or theme built on Meta Box that exposes the background field to lower-privileged users and renders stored values via the rwmb_the_value()/format_single_value() pattern; the effective minimum privilege is whatever role that consumer permits, demonstrated at Subscriber level.
Weakness: CWE-79
Which versions are affected by CVE-2026-109216?
How do I fix CVE-2026-109216?
No fix has been published for CVE-2026-109216 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-109216 being exploited?
There is no known exploitation of CVE-2026-109216 in the wild and no public exploit code.
Sources
Also known as GHSA-74q7-5hgm-hhc8.