Reflected Cross-Site Scripting in Everest Forms Plugin for WordPress
CVE-2026-91152

6.1MEDIUM

Key Information:

Vendor

WordPress
Status
Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder With Ai
Vendor
CVE Published:
29 October 2026

What is CVE-2026-91152?

The Everest Forms plugin for WordPress is susceptible to Reflected Cross-Site Scripting due to improper input validation and output escaping in the 'evf_toast_type' parameter. This vulnerability can be exploited by unauthenticated attackers who are able to persuade users to click on malicious links, potentially leading to the execution of arbitrary scripts on the user's browser. The attack requires a controlled sibling parameter, 'evf_toast', which can easily be manipulated by an attacker to facilitate the exploit.

Affected Version(s)

Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI 0 <= 3.6.2

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/everest-forms/...
https://plugins.trac.wordpress.org/browser/everest-forms/...

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Yuto Hyakumoto
.