CVE-2025-28948: Mediabay WordPress Plugin CSRF Vulnerability

CVE-2025-28948 Overview

CVE-2025-28948 is a Cross-Site Request Forgery (CSRF) vulnerability in the Mediabay - WordPress Media Library Folders plugin developed by codedraft. The flaw enables reflected Cross-Site Scripting (XSS) when an authenticated user is tricked into clicking a crafted link. The vulnerability affects all versions of the plugin from n/a through version 1.4. The issue is tracked under CWE-352 (Cross-Site Request Forgery) and has been published in the National Vulnerability Database (NVD).

Critical Impact

Successful exploitation lets an attacker execute arbitrary JavaScript in a victim's browser session, with a scope-changed impact across confidentiality, integrity, and availability.

Affected Products

• Mediabay - WordPress Media Library Folders plugin by codedraft
• All versions from n/a through 1.4
• WordPress installations using the vulnerable plugin

Discovery Timeline

• 2025-06-06 - CVE-2025-28948 published to NVD
• 2026-04-28 - Last updated in NVD database

Technical Details for CVE-2025-28948

Vulnerability Analysis

The vulnerability combines two weaknesses: missing CSRF protection and reflected XSS. The plugin processes requests without validating an anti-CSRF token. User-supplied input is then reflected back into the response without proper sanitization or output encoding. An attacker can craft a malicious URL or HTML page that, when visited by an authenticated WordPress user, triggers a request to the vulnerable endpoint. The reflected payload executes JavaScript in the context of the victim's browser session. The Exploit Prediction Scoring System (EPSS) currently rates this issue at 0.08%.

Root Cause

The plugin fails to implement WordPress nonce verification using functions such as wp_verify_nonce() or check_admin_referer(). It also fails to sanitize or escape user-controlled parameters before reflecting them in HTTP responses. This combination allows an attacker to trigger state-changing actions and inject script content through a victim's authenticated session.

Attack Vector

Exploitation requires user interaction. The attacker delivers a malicious link, typically through phishing or a third-party website hosting attacker-controlled HTML. When the victim, who must be authenticated to the targeted WordPress site, follows the link, the browser issues a forged request to the vulnerable Mediabay endpoint. The server reflects the malicious payload into the response. The injected script executes under the origin of the WordPress site, enabling cookie theft, session hijacking, or actions on behalf of the user.

No verified exploit code is publicly available. For technical details, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-28948

Indicators of Compromise

• Unexpected outbound requests from administrator browsers to attacker-controlled domains following visits to WordPress admin pages
• HTTP requests to Mediabay plugin endpoints containing <script> tags, javascript: URIs, or HTML event handlers in query parameters
• Web server access logs showing referrers from unknown external domains pointing to Mediabay endpoints
• New or modified WordPress user accounts, posts, or plugin settings created without administrator action

Detection Strategies

• Inspect web server logs for requests to Mediabay plugin URLs containing reflected payload markers such as %3Cscript%3E, onerror=, or onload=
• Deploy a Web Application Firewall (WAF) rule set that flags reflected XSS payloads in query strings targeting /wp-content/plugins/mediabay/ paths
• Monitor referrer headers on plugin endpoints for traffic originating from domains outside the trusted set
• Correlate authenticated WordPress session activity with subsequent anomalous administrative changes

Monitoring Recommendations

• Enable verbose access logging on the WordPress web server and forward logs to a centralized SIEM
• Alert on browser-side Content Security Policy (CSP) violation reports tied to WordPress admin pages
• Track plugin version inventory across all WordPress instances to detect installations still running version 1.4 or earlier

How to Mitigate CVE-2025-28948

Immediate Actions Required

• Identify all WordPress sites running the Mediabay - WordPress Media Library Folders plugin and confirm the installed version
• Deactivate and remove the plugin on any site running version 1.4 or earlier until a patched release is available
• Force re-authentication for WordPress administrators and rotate session cookies and credentials if exploitation is suspected
• Review user accounts, posts, and plugin configurations for unauthorized changes

Patch Information

At the time of publication, no fixed version has been listed in the NVD record. Monitor the Patchstack Vulnerability Report and the vendor's plugin page for an updated release that introduces nonce verification and output escaping. Apply the patch immediately once published.

Workarounds

• Remove or disable the Mediabay plugin until a patched version is released
• Restrict access to /wp-admin/ using IP allowlisting at the web server or reverse proxy
• Deploy a WAF rule that blocks requests to Mediabay endpoints containing HTML or JavaScript metacharacters in parameters
• Enforce a strict Content Security Policy on WordPress responses to limit inline script execution

# Example: disable the Mediabay plugin via WP-CLI
wp plugin deactivate mediabay
wp plugin delete mediabay