CVE-2025-32215: Accessibility Suite Stored XSS Vulnerability

CVE-2025-32215 Overview

CVE-2025-32215 is an Unrestricted Upload of File with Dangerous Type vulnerability [CWE-434] in the Ability, Inc Accessibility Suite (online-accessibility) WordPress plugin. The flaw affects all versions up to and including 4.18. An authenticated attacker with low privileges can upload files of dangerous types, resulting in Stored Cross-Site Scripting (XSS) against users who later interact with the affected content. The vulnerability requires user interaction and can impact resources beyond the vulnerable component, giving it a scope-changed rating.

Critical Impact
Authenticated attackers can upload malicious files that execute JavaScript in victim browsers, enabling session theft, administrative account takeover, and persistent site compromise.

Affected Products

Ability, Inc Accessibility Suite (online-accessibility) WordPress plugin
All versions from n/a through 4.18
WordPress sites with the plugin installed and active

Discovery Timeline

2025-04-10 - CVE-2025-32215 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-32215

Vulnerability Analysis

The Accessibility Suite plugin exposes a file upload endpoint that fails to restrict the types of files a low-privileged authenticated user can upload. Because the upload handler does not enforce a strict allowlist of extensions or validate MIME types and file contents, an attacker can submit files containing HTML or JavaScript payloads. When another user, typically an administrator or site visitor, loads a page that references the uploaded file, the embedded script executes in the victim's browser session.

The issue is a Stored XSS variant because the malicious payload persists on the server and executes on every subsequent view. The scope-changed classification indicates the impact extends beyond the plugin itself into the broader WordPress application context, where cookies, session tokens, and administrative actions become reachable through the injected script.

Root Cause

The root cause is missing validation on file uploads within the plugin, mapped to CWE-434 (Unrestricted Upload of File with Dangerous Type). The upload routine accepts file types that can be interpreted by the browser as HTML or JavaScript. The plugin does not sanitize file names, enforce a safe MIME-type allowlist, or reject files whose content differs from their declared type.

Attack Vector

Exploitation requires network access, low privileges (an authenticated account), and user interaction. An attacker with a subscriber-level or higher WordPress account uploads a crafted file through the vulnerable plugin endpoint. When an administrator or another user views a page rendering that file, the payload executes in their browser. See the Patchstack Vulnerability Report for additional technical context.

Detection Methods for CVE-2025-32215

Indicators of Compromise

Unexpected files with .html, .htm, .svg, .js, or double extensions in the plugin's upload directories under wp-content/uploads/.
Uploads originating from low-privileged user accounts that do not normally publish content.
Outbound requests from administrator browsers to attacker-controlled domains shortly after viewing plugin-managed pages.
Newly created administrator accounts or unexpected privilege changes following file uploads.

Detection Strategies

Audit WordPress upload directories for files with executable content types uploaded by non-editor accounts.
Inspect web server access logs for POST requests to the Accessibility Suite plugin's upload handler paths.
Review WordPress audit logs for file uploads correlated with subsequent script-driven administrative activity.

Monitoring Recommendations

Enable file integrity monitoring on the wp-content/uploads/ directory tree.
Deploy a web application firewall rule set to flag uploads of HTML, SVG, and JavaScript content through plugin endpoints.
Alert on WordPress option changes, user role modifications, and plugin installations initiated from administrator sessions immediately after file uploads.

How to Mitigate CVE-2025-32215

Immediate Actions Required

Update the Accessibility Suite plugin to a version above 4.18 as soon as the vendor publishes a fix.
Restrict registration and audit all existing accounts, removing any suspicious low-privileged users.
Scan wp-content/uploads/ for unauthorized HTML, SVG, or script files and remove any that are not legitimate.
Rotate administrator credentials and invalidate active sessions if compromise is suspected.

Patch Information

The vulnerability affects Accessibility Suite versions up to and including 4.18. Administrators should consult the Patchstack advisory for current patched-version guidance and apply the fixed release when available.

Workarounds

Deactivate and remove the Accessibility Suite plugin until a patched version is installed.
Enforce least privilege by disabling open user registration and limiting upload permissions to trusted roles.
Configure the web server to serve files from wp-content/uploads/ with a restrictive Content-Type and Content-Security-Policy that blocks inline script execution.
Add web application firewall rules that reject uploads with HTML, SVG, or JavaScript payloads to plugin endpoints.

bash

# Example nginx configuration to prevent script execution in uploads
location ~* /wp-content/uploads/.*\.(html?|svg|js|phtml|php)$ {
    deny all;
    return 403;
}