The Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the className, classHook, and blockId attributes in the Add to Cart block (essential-blocks/add-to-cart) in all versions up to, and including, 6.0.4. This is due to insufficient output escaping in the render_callback() function where these attributes are placed into class and data-id HTML attributes using raw sprintf() and implode() without esc_attr() escaping. While the outer wrapper div uses get_block_wrapper_attributes() which properly escapes, the inner divs do not. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
The Essential Blocks WordPress plugin is vulnerable to Stored Cross-Site Scripting (XSS) through improper escaping of className, classHook, and blockId attributes in the Add to Cart block. Authenticated contributors can inject malicious scripts that execute when users view affected pages.
تحتوي إضافة Essential Blocks على ثغرة XSS مخزنة في كتلة إضافة إلى السلة حيث لم يتم الهروب الكافي من سمات className و classHook و blockId. يمكن للمهاجمين الذين لديهم وصول على مستوى المساهم حقن نصوص برمجية ضارة تبقى وتُنفذ لجميع زوار الصفحة.
Essential Blocks WordPress plugin contains a stored XSS vulnerability in the Add to Cart block due to insufficient output escaping of user-supplied attributes. Attackers with contributor-level access can inject malicious scripts that persist and execute for all page visitors.
Update the Essential Blocks plugin to version 6.0.5 or later immediately. If immediate update is not possible, restrict contributor-level access to trusted users only and monitor page content for unauthorized modifications. Implement Web Application Firewall (WAF) rules to detect and block XSS payloads.
قم بتحديث إضافة Essential Blocks إلى الإصدار 6.0.5 أو أحدث فوراً. إذا لم يكن التحديث ممكناً، قيّد وصول مستوى المساهم للمستخدمين الموثوقين فقط وراقب محتوى الصفحات للتعديلات غير المصرح بها. طبّق قواعد جدار الحماية لتطبيقات الويب لكشف وحجب حمولات XSS.