How severe is CVE-2025-3421?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2025-3421 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Wpeverest Everest Forms – Contact Form, Payment Quiz, Survey & Custom Form Builder

CVE-2025-3421

The Everest Forms – Contact Form, Quiz, Survey, Newsletter & Payment Form Builder for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'form_id' parameter in all versions up to, and including, 3.1.1 du…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.010 (76.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Wpeverest Everest Forms – Contact Form, Payment Quiz, Survey & Custom Form Builder — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-3421?: CVE-2025-3421 is a medium-severity vulnerability in Wpeverest Everest Forms – Contact Form, Payment Quiz, Survey & Custom Form Builder, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-04-11.
How severe is CVE-2025-3421?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2025-3421 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.