CVE-2025-12033
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-22

Last updated on: 2025-10-22

Assigner: Wordfence

Description
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.
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Meta Information
Published
2025-10-22
Last Modified
2025-10-22
Generated
2026-06-10
AI Q&A
2025-10-22
EPSS Evaluated
2026-06-09
NVD
CVE-2025-12033
EUVD
EUVD-2025-35324
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
wordfence simple_banner *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

The vulnerability is a Stored Cross-Site Scripting (XSS) issue in the Simple Banner WordPress plugin (up to version 3.0.10). It occurs via the 'pro_version_activation_code' parameter due to insufficient input sanitization and output escaping. Authenticated attackers with administrator-level access can inject arbitrary web scripts that execute whenever a user accesses the injected page. This affects only multi-site installations and installations where unfiltered_html is disabled.

Impact Analysis

This vulnerability can allow an attacker with admin access to inject malicious scripts into the website pages, which will execute in the context of users visiting those pages. This can lead to theft of sensitive information, session hijacking, or other malicious actions performed on behalf of users without their consent.

Compliance Impact

The provided information does not specify how this vulnerability directly affects compliance with standards like GDPR or HIPAA.

Detection Guidance

This vulnerability can be detected by checking if the WordPress installation uses the Simple Banner plugin version 3.0.10 or earlier on a multi-site setup or where unfiltered_html is disabled. Since the vulnerability involves stored Cross-Site Scripting via the 'pro_version_activation_code' parameter, detection involves verifying if this parameter is being used maliciously. However, no specific detection commands or network scanning tools are provided in the available resources.

Mitigation Strategies

Immediate mitigation steps include updating the Simple Banner plugin to version 3.1.0 or later, which includes multiple improvements and presumably fixes related to the vulnerability. Additionally, restricting administrator-level access and ensuring that unfiltered_html is enabled or carefully managed can reduce risk. Since the vulnerability requires administrator-level access to exploit, limiting such privileges is important. [2]

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