WordPress Response Body Too Large and Too Many Arguments Errors

The "Response Body Too Large" and "Too Many Arguments in Request" errors are caused by ModSecurity rules that limit the size of HTTP responses and the number of parameters in a request. These commonly trigger when editing large WordPress pages, using page builders with lots of elements, or running plugins that generate large AJAX responses.

01. Response Body Too Large

ModSecurity has a limit on the size of the response body it will inspect. When a WordPress page generates a response larger than this limit (typically from a page builder creating complex layouts, or a plugin returning large JSON payloads), ModSecurity blocks the response.

Common triggers:

• Page builders - Elementor, Divi, WPBakery, Beaver Builder generating pages with many elements
• WooCommerce - product pages or admin screens with many variations
• Admin AJAX calls - plugins returning large datasets through admin-ajax.php
• Customizer - WordPress theme customizer loading all theme options at once

02. Too Many Arguments in Request

This error triggers when a form submission or AJAX request contains more parameters than ModSecurity allows. WordPress forms can be parameter-heavy, especially:

• Saving pages with many custom fields - ACF, Pods, or Meta Box with dozens of fields
• Bulk actions - selecting many posts/products for bulk edit
• Menu editor - saving a WordPress menu with 50+ items
• Plugin settings pages - plugins with many options on a single settings page

03. How to Fix Both

1. Check the error log - cPanel > Errors. Look for ModSecurity entries with rule IDs
2. Open a support ticket - include the rule ID and what you were doing (editing a page, saving settings, etc.)
3. We adjust the limits - we can increase SecResponseBodyLimit or SecArgumentsLimit for your account, or whitelist the specific rule

Temporary Workaround

While waiting for the support team to adjust the limits:

• Break large pages into smaller sections and save more frequently
• For bulk actions, select fewer items at a time
• For menus, consider using nested pages or a menu management plugin that saves incrementally

See also: 403 Forbidden - ModSecurity section | 500 Internal Server Error

Quick Recap

1. Both errors are ModSecurity limits - not bugs in your site
2. Page builders and complex forms - are the most common triggers
3. Check cPanel > Errors - get the rule ID
4. Open a ticket - we adjust the limits for your account
5. Break up large saves - as a temporary workaround

Last updated March 2026 · Browse all WordPress articles