CVE-2026-101921: WPForms <= 2.0.2.1 - Reflected Cross-Site Scripting via 'query_var' Smart Tag in iframe srcdoc Attribute

Vulnerability summary

CVE-2026-101921 is a medium (CVSS 4.7) Cross-site Scripting vulnerability in smub wpforms – ai form builder for wordpress – contact forms, payment forms, survey form, quiz & more. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 15.5% of scored vulnerabilities. Fixed in 2.0.2.2.

Timeline

1. 10-10-2026
   PublishedVulnerability first disclosed.
2. 11-10-2026
   Last modifiedVulnerability information updated.

Description

The WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'attacker-chosen key referenced by the smart tag (e.g. "x")' parameter in all versions up to, and including, 2.0.2.1 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 that a site administrator has previously saved a form whose description embeds a {query_var} Smart Tag inside an iframe srcdoc attribute and has enabled Show Description on a public-facing page.

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.