CVE-2026-103909 Cross-site scripting in Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More
Unauthenticated attackers can inject scripts via URL parameters in specific WordPress form configurations, requiring user interaction to execute.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-103909?
CVE-2026-103909 is a medium-severity cross-site scripting vulnerability in codepeople Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More, published on 3 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The Calculated Fields Form – AI Form Builder for WordPress – Contact, Payment, Quote, Quiz & More plugin for WordPress is vulnerable to Reflected DOM-Based Cross-Site Scripting via the 'arbitrary (whichever names the admin bound via url.<name>)' parameter in all versions up to, and including, 5.5.1.5 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Exploitation requires the targeted site to host a publicly accessible form in which an administrator has configured at least two fields with url.<name> predefined values that are used together in a concatenation equation — a plausible but not universal configuration.
Weakness: CWE-79
Which versions are affected by CVE-2026-103909?
How do I fix CVE-2026-103909?
No fix has been published for CVE-2026-103909 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-2026-103909 being exploited?
There is no known exploitation of CVE-2026-103909 in the wild and no public exploit code.
Sources
Also known as GHSA-8r3p-2rgw-5w3h.