CVE-2025-23825: Easy Shortcode Buttons XSS Vulnerability

CVE-2025-23825 Overview

CVE-2025-23825 is a stored Cross-Site Scripting (XSS) vulnerability in the osuthorpe Easy Shortcode Buttons WordPress plugin. The flaw affects all versions of the plugin up to and including version 1.2. An authenticated attacker with low privileges can inject malicious script content that persists in the application and executes in the browsers of users who view the affected pages.

The vulnerability is categorized under [CWE-79] Improper Neutralization of Input During Web Page Generation. Because the injected payload is stored server-side, exploitation can affect site administrators, editors, and public visitors depending on where the shortcode content renders.

Critical Impact
Stored XSS enables session hijacking, credential theft, and unauthorized actions in the context of privileged WordPress users.

Affected Products

osuthorpe Easy Shortcode Buttons WordPress plugin
All versions from initial release through 1.2
WordPress installations with the plugin activated

Discovery Timeline

2025-01-16 - CVE-2025-23825 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-23825

Vulnerability Analysis

The Easy Shortcode Buttons plugin fails to properly neutralize user-supplied input before rendering it within generated web pages. An authenticated user with low privileges submits input through plugin functionality, and that input is stored without adequate sanitization or output encoding. When another user loads a page containing the tainted data, the browser interprets the injected markup and executes any embedded JavaScript.

The attack requires user interaction, meaning a victim must load a page that includes the malicious payload. The scope is changed, which indicates the exploit crosses a security boundary and can affect resources outside the vulnerable component. This is consistent with stored XSS in a plugin that renders content in the WordPress administrative interface or front-end views.

Root Cause

The root cause is missing or insufficient input validation and output encoding on shortcode button configuration fields. The plugin trusts input from authenticated contributors or editors and writes it directly into HTML contexts. Without escaping functions such as esc_html(), esc_attr(), or wp_kses(), script tags and event handler attributes survive to render time.

Attack Vector

An attacker with contributor-level or higher access authenticates to the target WordPress site. The attacker crafts shortcode input containing JavaScript payloads, for example script tags or HTML event handlers. Once saved, the payload executes whenever an administrator or visitor views a page that includes the malicious shortcode output.

Refer to the Patchstack XSS Vulnerability Report for additional technical context.

Detection Methods for CVE-2025-23825

Indicators of Compromise

Unexpected <script> tags, javascript: URIs, or on* event handlers stored in WordPress wp_posts or plugin-specific database tables
Outbound HTTP requests from administrator browsers to unfamiliar domains shortly after loading plugin-rendered pages
New or modified WordPress administrator accounts created without a corresponding legitimate workflow
Session cookies observed in web server logs being replayed from unexpected IP addresses

Detection Strategies

Review the plugin database entries for HTML markup and script content that should not exist in shortcode configuration fields
Correlate authenticated low-privilege user actions with subsequent shortcode creation or modification events in WordPress audit logs
Deploy a Web Application Firewall (WAF) rule set that flags XSS payload patterns submitted to plugin endpoints
Monitor browser Content Security Policy (CSP) violation reports for unexpected inline script execution on administrative pages

Monitoring Recommendations

Enable WordPress audit logging to capture user role, source IP, and timestamps for all shortcode edits
Forward web server and application logs to a centralized platform for retention and correlation across sessions
Alert on privilege changes and new administrator account creation events
Track plugin file integrity to detect tampering that could accompany successful exploitation

How to Mitigate CVE-2025-23825

Immediate Actions Required

Deactivate the Easy Shortcode Buttons plugin on all WordPress installations until a patched version is available
Audit existing shortcode entries in the database and remove any content containing script tags, event handlers, or suspicious URIs
Rotate credentials and invalidate active sessions for administrator and editor accounts if exploitation is suspected
Review WordPress user roles and revoke unnecessary contributor or editor permissions

Patch Information

At the time of publication, the vendor advisory referenced by Patchstack does not list a fixed version beyond 1.2. Administrators should monitor the plugin repository for updates and apply them immediately upon release.

Workarounds

Remove the plugin entirely and replace shortcode functionality with a maintained alternative that properly sanitizes input
Deploy a WAF rule to block requests containing XSS payloads targeting plugin endpoints
Enforce a strict Content Security Policy that disallows inline scripts on both administrative and public pages
Restrict shortcode editing capabilities to trusted administrator accounts only through role management plugins

bash

# Configuration example: disable the vulnerable plugin via WP-CLI
wp plugin deactivate easy-shortcode-buttons
wp plugin delete easy-shortcode-buttons