---
id: CVE-2025-12033
title: >-
  The Simple Banner – Easily add multiple
  Banners/Bars/Notifications/Announcements to the top or bottom of your website
  plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the
  'pro_version_activation_code' parameter in al…
summary: >-
  The Simple Banner – Easily add multiple
  Banners/Bars/Notifications/Announcements to the top or bottom of your website
  plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the
  'pro_version_activation_code' parameter in al…
severity: medium
cvss: 4.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
published: '2025-10-22'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T11:10:00.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-12033'
references:
  - url: >-
      https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3363618%40simple-banner&new=3363618%40simple-banner&sfp_email=&sfph_mail=
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/9b620481-8f45-4616-9b22-2dd14733325c?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.0019
epssPercentile: 0.07906
ingestedAt: '2026-10-08T11:31:27.481Z'
---

## Overview

The Simple Banner – Easily add multiple Banners/Bars/Notifications/Announcements to the top or bottom of your website plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'pro_version_activation_code' parameter in all versions up to, and including, 3.0.10 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

## Remediation

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