Executive Summary

The Accordion and Accordion Slider plugin for WordPress has an authorization bypass vulnerability in all versions up to and including 1.4.5. This occurs because the plugin does not properly verify whether a user is authorized to perform certain actions in the functions 'wp_aas_save_attachment_data' and 'wp_aas_get_attachment_edit_form'.

As a result, authenticated users with contributor level access or higher can read and modify attachment metadata such as file paths, titles, captions, alt text, and custom links for any attachment on the site.

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Impact Analysis

This vulnerability allows attackers with contributor-level access or above to read and modify sensitive attachment metadata on the WordPress site. They can change file paths, titles, captions, alt text, and custom links associated with attachments.

Such unauthorized modifications can lead to misinformation, broken links, or exposure of sensitive file information, potentially undermining the integrity and trustworthiness of the website's content.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability involves authorization bypass in the Accordion and Accordion Slider WordPress plugin versions up to 1.4.5, allowing authenticated users with contributor access or higher to read and modify attachment metadata.'}, {'type': 'paragraph', 'content': 'To detect this vulnerability on your system, you should first identify if the vulnerable plugin version is installed on your WordPress site.'}, {'type': 'list_item', 'content': "Check the installed plugin version via WordPress admin dashboard or by running a command to read the plugin version from the plugin's main file, for example:"}, {'type': 'list_item', 'content': 'grep -i "Version" wp-content/plugins/accordion-and-accordion-slider/readme.txt'}, {'type': 'list_item', 'content': 'or'}, {'type': 'list_item', 'content': 'grep -i "Version" wp-content/plugins/accordion-and-accordion-slider/accordion-slider.php'}, {'type': 'paragraph', 'content': "Additionally, monitoring for suspicious AJAX requests to the endpoints 'wp_aas_save_attachment_data' and 'wp_aas_get_attachment_edit_form' could indicate exploitation attempts, as these are the vulnerable functions."}, {'type': 'list_item', 'content': 'Example command to check web server logs for such AJAX calls:'}, {'type': 'list_item', 'content': "grep -E 'wp_aas_save_attachment_data|wp_aas_get_attachment_edit_form' /var/log/apache2/access.log"}, {'type': 'list_item', 'content': 'or'}, {'type': 'list_item', 'content': "grep -E 'wp_aas_save_attachment_data|wp_aas_get_attachment_edit_form' /var/log/nginx/access.log"}] [1]

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Mitigation Strategies

[{'type': 'paragraph', 'content': 'The primary mitigation step is to update the Accordion and Accordion Slider plugin to version 1.4.6 or later, where the authorization checks have been properly implemented.'}, {'type': 'paragraph', 'content': 'If immediate updating is not possible, restrict access to users with contributor level or higher, and monitor or block suspicious AJAX requests to the vulnerable endpoints.'}, {'type': 'paragraph', 'content': 'Additionally, review user permissions to ensure that only trusted users have contributor or higher access.'}, {'type': 'paragraph', 'content': "Implementing web application firewall (WAF) rules to block unauthorized AJAX calls to 'wp_aas_save_attachment_data' and 'wp_aas_get_attachment_edit_form' can also help mitigate exploitation."}] [1]

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