CVE-2026-18325 Forminator Forms <= 1.56.1 - Unauthenticated Stored Cross-Site Scripting via Forged Upload Record via Select Field
Unauthenticated attackers can inject arbitrary scripts via forged upload records in the Forminator Forms plugin, leading to stored XSS.
- 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-2026-18325?
CVE-2026-18325 is a high-severity cross-site scripting vulnerability in wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Forminator Forms – Contact Form, Payment Form & Custom Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Forged Upload Record via Select Field in all versions up to, and including, 1.56.1 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. The exploit is possible because Forminator_Core::sanitize_array() skips all filtering for keys prefixed with 'select-', and set_field_data() treats a submitted 'return' member as a trusted internal flag — allowing an unauthenticated attacker to forge and persist a complete upload field record with an arbitrary file_url value without any sanitization or validation.
Weakness: CWE-79
Which versions are affected by CVE-2026-18325?
How do I fix CVE-2026-18325?
No fix has been published for CVE-2026-18325 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-2026-18325 being exploited?
There is no known exploitation of CVE-2026-18325 in the wild and no public exploit code.
Sources
Also known as GHSA-9m8m-xgrc-pfc4.