CVE-2025-30899: WordPress User Registration plugin <= 4.0.3 - Cross Site Scripting (XSS) vulnerability

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-03-27 · updated 2026-06-17
Weakness: CWE-79

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in wpeverest User Registration user-registration allows Stored XSS.This issue affects User Registration: from n/a through <= 4.0.3.

Affected products

User Registration & Membership: before 4.0.4; before 5.0.4 — fixed in 4.0.4, 5.0.4

How to fix

Upgrade to a fixed version: User Registration & Membership 4.0.4, 5.0.4. Check the vendor advisory for mitigations.

References

https://patchstack.com/database/Wordpress/Plugin/user-registration/vulnerability/wordpress-user-registration-plugin-4-0-3-cross-site-scripting-xss-vulnerability?_s_id=cve

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