---
id: CVE-2025-12160
title: >-
  The Simple User Registration plugin for WordPress is vulnerable to Stored
  Cross-Site Scripting via the 'wpr_admin_msg' parameter in all versions up to,
  and including, 6.6 due to insufficient input sanitization and output escaping
summary: >-
  The Simple User Registration plugin for WordPress is vulnerable to Stored
  Cross-Site Scripting via the 'wpr_admin_msg' parameter in all versions up to,
  and including, 6.6 due to insufficient input sanitization and output escaping.
  This m…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
published: '2025-11-21'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T23:10:00.237'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-12160'
references:
  - url: >-
      https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3396064%40wp-registration&new=3396064%40wp-registration&sfp_email=&sfph_mail=
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/9bb5e60d-f7c9-4b47-ba6f-0f2d1d060263?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00226
epssPercentile: 0.12056
ingestedAt: '2026-09-30T23:29:32.473Z'
---

## Overview

The Simple User Registration plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'wpr_admin_msg' parameter in all versions up to, and including, 6.6 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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.