CVE-2026-116761 CMB2 <= 2.13.4 - Unauthenticated Stored Cross-Site Scripting via Grouped WYSIWYG Field via Front-End Form
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-116761?
CVE-2026-116761 is a medium-severity vulnerability in jtsternberg CMB2, published on 28 Oct 2026.
Official description
The CMB2 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'cmb43ex1_grp[0][txt] (wysiwyg field inside group — field id controlled by integrator config)' parameter in all versions up to, and including, 2.13.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is only exploitable when a site integrator renders the plugin's documented front-end form helper with a wysiwyg field inside a repeatable group on a publicly accessible page.
Weakness: CWE-79
Which versions are affected by CVE-2026-116761?
How do I fix CVE-2026-116761?
No fix has been published for CVE-2026-116761 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-116761 being exploited?
There is no known exploitation of CVE-2026-116761 in the wild and no public exploit code.
Sources
Also known as GHSA-rfx8-wq2m-j436.