CVE-2025-22579: WP Header Notification Stored XSS Vulnerability

CVE-2025-22579 Overview

CVE-2025-22579 is a stored Cross-Site Scripting (XSS) vulnerability in the Arefly WP Header Notification plugin for WordPress. The flaw affects all versions of wp-header-notification up to and including 1.2.7. The plugin fails to properly neutralize user-supplied input during web page generation, allowing an authenticated attacker with high privileges to inject persistent JavaScript payloads. Injected scripts execute in the browser context of any visitor who loads the affected page. The issue is tracked under CWE-79.

Critical Impact
An authenticated attacker can store malicious JavaScript in the notification header, executing arbitrary script in the browser of any user who visits an affected page.

Affected Products

Arefly WP Header Notification plugin (wp-header-notification) versions up to and including 1.2.7
WordPress sites with the plugin installed and active
Any user session visiting pages rendering the header notification

Discovery Timeline

2025-01-07 - CVE CVE-2025-22579 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-22579

Vulnerability Analysis

The vulnerability is a stored XSS flaw in the WP Header Notification plugin. The plugin accepts user-supplied notification content through administrative inputs and renders that content in page headers without sufficient output encoding or input sanitization. An attacker with high-privilege access can persist a payload that runs in every visitor's browser session.

Exploitation requires user interaction, and the scope changes because injected script executes in the context of the WordPress front-end delivered to other users. Impact spans confidentiality, integrity, and availability at a limited level, including session cookie theft, defacement, and forced navigation.

Root Cause

The root cause is improper neutralization of input during web page generation [CWE-79]. The plugin does not apply WordPress escaping functions such as esc_html(), esc_attr(), or wp_kses() to notification field data before echoing it into the rendered HTML. As a result, HTML and JavaScript tokens supplied by an administrator persist verbatim in stored settings and reach the DOM without transformation.

Attack Vector

The attack vector is network-based. An authenticated attacker with sufficient privileges to modify plugin settings submits a notification value containing HTML or JavaScript. The payload is stored in the WordPress options table and rendered in the notification header on subsequent page loads. Any user who loads a page containing the header, including administrators, triggers execution of the injected script under the site origin.

The stored nature of the flaw makes exploitation persistent. Follow-on actions include session token theft, forced actions via authenticated CSRF chains, credential harvesting through injected forms, and pivoting to full site takeover if an administrator session is captured. Refer to the Patchstack WordPress Vulnerability Report for advisory details.

Detection Methods for CVE-2025-22579

Indicators of Compromise

Unexpected <script>, <iframe>, or event-handler attributes (onerror, onload) in the header notification settings stored in the wp_options table.
Outbound requests from client browsers to unfamiliar domains immediately after loading pages that render the header notification.
WordPress audit log entries showing modification of WP Header Notification plugin settings by non-standard administrator accounts.

Detection Strategies

Review WordPress database options associated with wp-header-notification for HTML or JavaScript tokens using queries such as SELECT * FROM wp_options WHERE option_name LIKE '%header_notification%'.
Deploy a Web Application Firewall (WAF) rule to alert on POST requests to plugin settings endpoints containing script tags or common XSS payload patterns.
Perform authenticated browser-based scans of WordPress front-end pages to detect script execution originating from the notification header region.

Monitoring Recommendations

Monitor administrative account activity in WordPress, particularly plugin setting changes performed outside routine maintenance windows.
Track Content Security Policy (CSP) violation reports for inline script execution originating from the header container.
Alert on new or modified rows in wp_options where values contain <script, javascript:, or HTML event handlers.

How to Mitigate CVE-2025-22579

Immediate Actions Required

Deactivate the WP Header Notification plugin on all WordPress sites running version 1.2.7 or earlier until a fixed release is verified.
Audit administrator and editor accounts for unauthorized access and rotate credentials where compromise is suspected.
Inspect the header notification settings and remove any content containing HTML or JavaScript.

Patch Information

At the time of publication, the vendor advisory listed by Patchstack indicates the vulnerability affects versions up to and including 1.2.7. Administrators should consult the Patchstack advisory and the plugin's WordPress.org page for the most current fixed version and upgrade accordingly.

Workarounds

Restrict plugin settings modification to a minimal set of trusted administrators using role management controls.
Deploy a Content Security Policy (CSP) that disallows inline scripts and restricts allowed script sources.
Configure a WAF rule to block requests containing script tags or event-handler attributes targeting the plugin's settings endpoints.

bash

# Configuration example: disable the vulnerable plugin via WP-CLI
wp plugin deactivate wp-header-notification
wp plugin delete wp-header-notification