CVE-2026-103911 Code injection in Forminator Forms – Contact Form, Payment Form & Custom Form Builder
Unauthenticated attackers can execute arbitrary shortcodes via search or comments, leading to code execution in WordPress installations using the Forminator Forms plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-103911?
CVE-2026-103911 is a medium-severity code injection vulnerability in wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The The Forminator Forms – Contact Form, Payment Form & Custom Form Builder plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 1.58.1. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes. This is exploitable on any block-theme install via a single unauthenticated GET request to the search results page, or by submitting an anonymous comment on any post with comments enabled; no Forminator-specific content or configuration is required to trigger execution.
Weakness: CWE-94
Which versions are affected by CVE-2026-103911?
How do I fix CVE-2026-103911?
No fix has been published for CVE-2026-103911 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-103911 being exploited?
There is no known exploitation of CVE-2026-103911 in the wild and no public exploit code.
Sources
Also known as GHSA-42pr-q557-jgxc.