Executive Summary

This vulnerability exists in the Accessiy By CodeConfig Accessibility plugin for WordPress (up to version 1.0.0) and is an authorization bypass issue. It occurs because the plugin does not properly verify whether a user is authorized to perform certain actions. As a result, authenticated users with subscriber-level access or higher can modify the plugin's global accessibility settings, which they should not normally be able to do.

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Impact Analysis

The vulnerability allows authenticated users with low-level access (subscriber and above) to change global accessibility settings of the plugin. This could lead to unauthorized changes that affect the accessibility features of the website, potentially disrupting user experience or enabling further exploitation depending on how these settings are used.

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Compliance Impact

The provided information does not specify how the CVE-2025-13309 vulnerability impacts compliance with common standards and regulations such as GDPR or HIPAA. The vulnerability allows authenticated users with subscriber-level access to modify global accessibility settings due to authorization bypass, but there is no explicit mention of data privacy, personal data exposure, or regulatory compliance implications in the provided resources.

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Detection Guidance

To detect this vulnerability, you can monitor AJAX requests related to the CodeConfig Accessibility plugin's settings update actions, particularly those targeting the 'UpdateSettings' AJAX action. Look for unauthorized or suspicious POST requests to admin-ajax.php with the action parameter set to 'ccpcaUpdateSettings' or similar. Since the vulnerability involves authorization bypass allowing subscriber-level users to modify global accessibility settings, you can check for unexpected changes in plugin settings or audit logs for such AJAX calls. Commands to detect such activity could include using web server logs or network monitoring tools to filter requests, for example: 1. Using grep on web server logs to find AJAX update requests: `grep 'action=ccpcaUpdateSettings' /var/log/apache2/access.log` 2. Using curl to test if a subscriber-level user can perform update actions (requires authentication): `curl -X POST -d 'action=ccpcaUpdateSettings&ccpca_nonce=NONCE_VALUE&data=...' https://yourwordpresssite.com/wp-admin/admin-ajax.php` 3. Using WordPress CLI or plugins to audit recent changes to plugin settings or user capabilities. Note that exact commands depend on your environment and logging setup. [1, 2]

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Mitigation Strategies

Immediate mitigation steps include: 1. Update the CodeConfig Accessibility plugin to a version later than 1.0.0 where the vulnerability is fixed. 2. Restrict access to the plugin's AJAX actions by ensuring proper capability checks and nonce verifications are enforced. 3. Temporarily disable or restrict the plugin if an update is not immediately available. 4. Monitor and audit user roles and permissions, especially subscriber-level accounts, to prevent unauthorized changes. 5. Implement web application firewall (WAF) rules to block suspicious AJAX requests targeting the plugin's settings update endpoints. 6. Review and harden WordPress security settings, including limiting plugin management capabilities to trusted users only. These steps help prevent unauthorized modification of global accessibility settings via the authorization bypass vulnerability. [2]

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