CVE-2025-23816 Overview
CVE-2025-23816 is a stored Cross-Site Scripting (XSS) vulnerability in the Metaphor Widgets WordPress plugin by metaphorcreations. The flaw stems from improper neutralization of user-supplied input during web page generation [CWE-79]. All plugin versions up to and including 2.4 are affected. An authenticated attacker with low privileges can inject persistent JavaScript payloads that execute in the browsers of other users, including administrators, when they view affected pages.
Critical Impact
Stored JavaScript payloads execute in the browser context of any visitor rendering the affected widget, enabling session theft, forced administrative actions, and cross-user compromise across the WordPress site.
Affected Products
- metaphorcreations Metaphor Widgets plugin for WordPress
- All versions from n/a through 2.4
- WordPress sites with the vulnerable plugin activated
Discovery Timeline
- 2025-01-16 - CVE-2025-23816 published to the National Vulnerability Database (NVD)
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-23816
Vulnerability Analysis
The Metaphor Widgets plugin fails to properly sanitize and escape user-supplied input before rendering it in the WordPress page output. Contributors and other low-privileged users can inject arbitrary HTML and JavaScript through widget configuration fields. The malicious content is persistently stored in the WordPress database and served to every visitor who loads a page containing the compromised widget.
Because the payload persists server-side, exploitation does not depend on tricking a specific victim into visiting a crafted URL. The Patchstack advisory classifies the flaw as a stored XSS with a scope change, meaning injected scripts execute beyond the vulnerable component into the wider WordPress administrative context.
Root Cause
The root cause is missing output escaping and input sanitization on widget fields rendered by the plugin. WordPress provides helper functions such as esc_html(), esc_attr(), and wp_kses_post() for context-appropriate escaping. The vulnerable code paths in Metaphor Widgets 2.4 and earlier omit these calls, allowing raw HTML and <script> tags to reach the DOM.
Attack Vector
Exploitation requires network access to the WordPress site and authentication as a user with permission to configure widgets, typically a Contributor or higher. The attacker enters a JavaScript payload into a widget field. When any user, including administrators or unauthenticated visitors, loads a page rendering that widget, the payload executes under the site's origin. User interaction is required to trigger the payload delivery, but the impact spans confidentiality, integrity, and availability of the affected browser session.
See the Patchstack XSS Vulnerability Advisory for additional technical detail. No public proof-of-concept exploit code is currently available.
Detection Methods for CVE-2025-23816
Indicators of Compromise
- Widget configuration entries in the wp_options or wp_posts tables containing <script> tags, javascript: URIs, or event handlers such as onerror= and onload=
- Unexpected outbound HTTP requests from administrator browsers to attacker-controlled domains after loading pages containing Metaphor Widgets
- New administrator accounts or modified user roles created shortly after an administrator accessed a page with a compromised widget
Detection Strategies
- Audit all Metaphor Widgets configurations for HTML tags, JavaScript event handlers, and encoded payloads such as <script>
- Inspect WordPress access logs for POST requests to admin-ajax.php or widget configuration endpoints originating from low-privileged accounts
- Deploy a Web Application Firewall (WAF) rule set that flags widget update requests containing script-like content
Monitoring Recommendations
- Enable WordPress activity logging to record widget modifications, including the user, timestamp, and payload content
- Monitor Content Security Policy (CSP) violation reports for inline script executions on pages rendered by the plugin
- Alert on any Contributor or Author account that modifies widget configurations outside expected editorial workflows
How to Mitigate CVE-2025-23816
Immediate Actions Required
- Deactivate the Metaphor Widgets plugin until a patched release beyond version 2.4 is confirmed available
- Review all existing widget content for injected scripts and remove any unauthorized payloads
- Rotate credentials for any administrator who accessed pages rendering Metaphor Widgets since installation, and invalidate active WordPress sessions
Patch Information
At the time of publication, the vendor advisory tracked at Patchstack lists versions through 2.4 as affected. Administrators should monitor the plugin repository for a release above 2.4 and apply it as soon as it is published.
Workarounds
- Restrict widget configuration capabilities to trusted administrators by removing the edit_theme_options capability from Contributor and Author roles
- Enforce a strict Content Security Policy that disallows inline scripts and untrusted script sources on pages using the plugin
- Place the WordPress site behind a WAF configured to block XSS payloads in POST parameters targeting widget endpoints
# Example: strict CSP header in an Apache .htaccess file
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
