Accessibly <= 3.0.3 - Missing Authorization to Unauthenticated Stored Cross-Site Scripting via Widget Source Injection via REST API
The Accessibly plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the REST API in all versions up to, and including, 3.0.3. The plugin registers REST API endpoints at /otm-ac/v1/update-widget-options and /otm-ac/v1/update-app-config with the permission_callback set to __return_true, which means no authentication or authorization check is performed. The updateWidgetOptions() function in AdminApi.php accepts user-supplied JSON data and passes it directly to AccessiblyOptions::updateAppConfig(), which saves it to the WordPress options table via update_option() without any sanitization or validation. The stored widgetSrc value is later retrieved by AssetsManager::enqueueFrontendScripts() and passed directly to wp_enqueue_script() as the script URL, causing it to be rendered as a <script> tag on every front-end page. This makes it possible for unauthenticated attackers to inject arbitrary JavaScript that executes for all site visitors by changing the widgetSrc option to point to a malicious external script.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | Accessibly – WordPress Website Accessibility | <= 3.0.3 | no fix |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- WordPress
- Package
Accessibly – WordPress Website Accessibility- Disclosed
- 14.04.2026
- Updated
- 11.10.2026 10:23
Sources and licenses
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Vulnerability history: Accessibly – WordPress Website Accessibility
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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