Answer in brief
CVE-2026-18328 records a High severity (CVSS 7.2) vulnerability in Forminator Forms <= 1.57.0 - Unauthenticated DOM-Based Cross-Site Scripting via 'error_description' Parameter. The current sources do not mark it as known exploited. The current feed maps wpmudev/Forminator Forms – Contact Form, Payment Form & Custom Form Builder (generic), wpmudev/Forminator Forms – Contact Form, Payment Form & Custom Form Builder (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps wpmudev/Forminator Forms – Contact Form, Payment Form & Custom Form Builder (generic), wpmudev/Forminator Forms – Contact Form, Payment Form & Custom Form Builder (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| wpmudev/Forminator Forms – Contact Form, Payment Form & Custom Form Buildergeneric | >=0 <=1.57.0 | Not reported |
| wpmudev/Forminator Forms – Contact Form, Payment Form & Custom Form Buildergeneric | 0 | Not reported |
Published upstream
Aug 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 25, 2026
The Forminator Forms – Contact Form, Payment Form & Custom Form Builder plugin for WordPress is vulnerable to DOM-Based Reflected Cross-Site Scripting via the 'error_description' parameter in all versions up to, and including, 1.57.0 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 vulnerability is only triggerable on pages hosting a Forminator form configured to use the Stripe Checkout Sessions payment API, which became the default in 1.56.0.
Quoted source text, attributed separately from HOL analysis.