CVE-2025-6756 Cross-site scripting in Ultra Addons for Contact Form 7

Medium 6.4 Published 1 Jul 2025 Updated 8 Apr 2026

Authenticated attackers with contributor access can inject arbitrary scripts via the UACF7_CUSTOM_FIELDS shortcode, executing them on victim pages.

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-2025-6756?

CVE-2025-6756 is a medium-severity cross-site scripting vulnerability in themefic Ultra Addons for Contact Form 7, published on 1 Jul 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The Ultra Addons for Contact Form 7 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's UACF7_CUSTOM_FIELDS shortcode in all versions up to, and including, 3.5.21 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-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-2025-6756?

It affects 1 product.

Products include Themefic Ultimate Addons for Contact Form 7.

How do I fix CVE-2025-6756?

No fix has been published for CVE-2025-6756 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-2025-6756 being exploited?

There is no known exploitation of CVE-2025-6756 in the wild and no public exploit code.

Sources

Also known as GHSA-gr75-cpjh-rxc4.