CVE-2026-4388 Form Maker by 10Web <= 1.15.40 - Unauthenticated Stored Cross-Site Scripting via Matrix Field Text Box
Unauthenticated attackers can inject JavaScript via form submissions that executes in the administrator's browser, potentially leading to account takeover.
- 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-2026-4388?
CVE-2026-4388 is a high-severity cross-site scripting vulnerability in Form Maker by 10Web – Mobile-Friendly Drag & Drop Contact Form Builder, published on 14 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Form Maker by 10Web plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Matrix field (Text Box input type) in form submissions in all versions up to, and including, 1.15.40. This is due to insufficient input sanitization (`sanitize_text_field` strips tags but not quotes) and missing output escaping when rendering submission data in the admin Submissions view. This makes it possible for unauthenticated attackers to inject arbitrary JavaScript through a form submission that executes in the browser of an administrator who views the submission details.
Weakness: CWE-79
Which versions are affected by CVE-2026-4388?
How do I fix CVE-2026-4388?
No fix has been published for CVE-2026-4388 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-2026-4388 being exploited?
There is no known exploitation of CVE-2026-4388 in the wild and no public exploit code.
Sources
Also known as GHSA-73v2-xp42-4vcq.