Is AMP for WP safe? Known vulnerabilities and latest version

The AMP for WP – Accelerated Mobile Pages plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'headline-*' Shortcode Attribute in all versions up to, and including, 1.1.17 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. A Subscriber-level user can store a malicious shortcode in their biographical info field; because WordPress core's wp_filter_kses() only strips HTML tags and not shortcode syntax, and because AMP content sanitizers run before do_shortcode() processes the archive description, the synthesized markup is never post-sanitized.

The AMP for WP – Accelerated Mobile Pages plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content via Regex Transformation in all versions up to, and including, 1.1.16 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The crafted payload uses only WordPress-permitted comment tags and attributes (an anchor with href and title), and the AMP sanitizer pipeline omits javascript: protocol blocking, meaning neither the comment save filter nor the AMP output stage removes the malicious URI introduced by the transformation.

The AMP for WP – Accelerated Mobile Pages plugin for WordPress is vulnerable to Arbitrary File Write in versions up to and including 1.1.12. This is due to unsafe ZIP file extraction in the ampforwp_save_local_font() function combined with inadequate cleanup that fails to remove nested directories and files. This makes it possible for authenticated attackers, with Author-level access and above, and permissions granted by an Administrator, to write arbitrary files to the server in a web-accessible location, potentially leading to remote code execution on hosts that execute PHP files in the uploads directory.

The AMP for WP plugin for WordPress is vulnerable to Stored Cross-Site Scripting via SVG file uploads in all versions up to, and including, 1.1.10. This is due to insufficient sanitization of SVG file content that only removes `<script>` tags while allowing other XSS vectors such as event handlers (onload, onerror, onmouseover), foreignObject elements, and SVG animation attributes. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts via malicious SVG file uploads that will execute whenever a user views the uploaded file.

The AMP for WP – Accelerated Mobile Pages plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.1.9. This is due to inverted nonce verification logic in the amp_theme_ajaxcomments AJAX handler, which rejects requests with VALID nonces and accepts requests with MISSING or INVALID nonces. This makes it possible for unauthenticated attackers to submit comments on behalf of logged-in users via a forged request granted they can trick a user into performing an action such as clicking on a link, and the plugin's template mode is enabled.

The AMP for WP – Accelerated Mobile Pages plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the disqus_name parameter in all versions up to, and including, 1.1.1 due to insufficient input validation. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Missing Authorization vulnerability in Ahmed Kaludi, Mohammed Kaludi AMP for WP allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects AMP for WP: from n/a through 1.0.96.1.

The AMP for WP – Accelerated Mobile Pages plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.0.99.1. This is due to missing or incorrect nonce validation on the 'proxy' function. This makes it possible for unauthenticated attackers to send the logged in user's cookies to their own server via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

The AMP for WP – Accelerated Mobile Pages plugin for WordPress is vulnerable to Stored Cross-Site Scripting via SVG File uploads in all versions up to, and including, 1.0.96.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses the SVG file.

The AMP for WP – Accelerated Mobile Pages plugin for WordPress is vulnerable to unauthorized loss of data due to a missing capability check on the 'amppb_remove_saved_layout_data' function in all versions up to, and including, 1.0.93.1. This makes it possible for authenticated attackers, with contributor access and above, to delete arbitrary posts on the site.

The AMP for WP – Accelerated Mobile Pages plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'disqus_name' parameter in all versions up to, and including, 1.0.92.1 due to insufficient input sanitization and output escaping on the executed JS file. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

The AMP for WP – Accelerated Mobile Pages plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's shortcode(s) in all versions up to, and including, 1.0.92 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Ahmed Kaludi, Mohammed Kaludi AMP for WP – Accelerated Mobile Pages allows Stored XSS.This issue affects AMP for WP – Accelerated Mobile Pages: from n/a through 1.0.88.1.

Authenticated (admin+) Stored Cross-Site Scripting (XSS) vulnerability discovered in AMP for WP – Accelerated Mobile Pages plugin <= 1.0.77.31 versions.

Multiple Authenticated (admin user role) Persistent Cross-Site Scripting (XSS) vulnerabilities discovered in AMP for WP – Accelerated Mobile Pages WordPress plugin (versions <= 1.0.77.32).

ampforwp_save_steps_data in the AMP for WP plugin before 0.9.97.21 for WordPress allows stored XSS.