Executive Summary

CVE-2026-3075 is a Sensitive Data Exposure vulnerability in the WordPress Simple Ajax Chat Plugin versions up to and including 20251121.

It allows unauthenticated attackers to access sensitive information that is normally restricted, potentially enabling further exploitation of other system weaknesses.

This vulnerability affects users running web servers other than Apache, such as nginx or IIS.

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Impact Analysis

The vulnerability can lead to unauthorized exposure of sensitive system information.

This exposure may allow attackers to gain insights into the system that could be used to exploit other vulnerabilities.

However, the vulnerability is considered low severity with a CVSS score of 5.3, and no impactful threat is expected according to Patchstack.

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Compliance Impact

I don't know

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Detection Guidance

CVE-2026-3075 is a Sensitive Data Exposure vulnerability in the Simple Ajax Chat WordPress plugin that allows unauthenticated attackers to access sensitive information. Detection involves checking if your system is running a vulnerable version of the plugin (up to and including 20251121) and if your web server is not Apache (e.g., nginx or IIS), as Apache is not affected.

Since the vulnerability allows retrieval of embedded sensitive data, one way to detect it is by attempting to access known plugin endpoints or URLs that might expose sensitive data without authentication.

Specific commands are not provided in the available resources, but general approaches include:

• Use curl or wget to request plugin-related URLs and check for sensitive data exposure, for example: curl -i http://yourdomain.com/wp-content/plugins/simple-ajax-chat/ or other plugin-specific endpoints.
• Scan your WordPress installation for the plugin version using WP-CLI: wp plugin list | grep simple-ajax-chat
• Check your web server type to confirm if it is affected (e.g., nginx or IIS) by running commands like nginx -v or checking IIS configuration.

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Mitigation Strategies

The primary mitigation step is to update the Simple Ajax Chat plugin to version 20260217 or later, as this version contains the patch for the vulnerability.

If immediate updating is not possible, consider disabling the plugin temporarily to prevent exposure of sensitive data.

Additionally, ensure your web server is properly configured to restrict unauthorized access to plugin files and sensitive data.

Patchstack also offers mitigation solutions including auto-updates for vulnerable plugins, which can be used to keep the plugin up to date automatically.

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