Impact Analysis

Exploitation of this vulnerability can lead to serious impacts including exposure of sensitive information like database credentials.

Attackers could gain unauthorized access to the database, potentially leading to a complete database takeover.

This can result in data breaches, loss of data integrity, and availability issues for the affected website.

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Detection Guidance

This vulnerability affects the WordPress Aperitif Theme versions 1.5 and below and involves Local File Inclusion (LFI) that can be exploited without authentication.

To detect this vulnerability on your system, you should first verify the version of the Aperitif theme installed on your WordPress site. If the version is 1.5 or below, it is vulnerable.

While no specific detection commands are provided, common approaches include:

• Checking the theme version via WordPress admin dashboard or by inspecting the theme files.
• Using web vulnerability scanners that detect Local File Inclusion vulnerabilities.
• Monitoring web server logs for suspicious requests attempting to include local files, such as requests containing directory traversal patterns (e.g., "../") or attempts to access sensitive files.
• Example command to check theme version via command line (if you have access to the server):
• grep 'Version' wp-content/themes/aperitif/style.css

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Mitigation Strategies

The immediate and recommended mitigation step is to update the Aperitif WordPress theme to version 1.6 or later, where this vulnerability has been patched.

Until the update can be applied, it is advised to implement the mitigation rule provided by Patchstack to block attacks exploiting this vulnerability.

• Update the Aperitif theme to version 1.6 or higher.
• Apply Patchstack's mitigation rule to block LFI attack attempts.
• Monitor your web server logs for suspicious activity related to Local File Inclusion attempts.

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Executive Summary

CVE-2026-39549 is a Local File Inclusion (LFI) vulnerability found in the WordPress Aperitif Theme versions 1.5 and below.

This flaw allows attackers to include local files on the target website without needing to authenticate, which means anyone can exploit it.

By exploiting this vulnerability, attackers can potentially access sensitive data such as database credentials and even take over the entire database.

The vulnerability is considered high risk with a CVSS score of 8.1 and is classified under OWASP Top 10 A3: Injection.

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Compliance Impact

This vulnerability allows unauthenticated attackers to include local files on the target website, potentially exposing sensitive data such as database credentials and enabling complete database takeover.

Exposure of sensitive data due to this vulnerability could lead to non-compliance with data protection regulations like GDPR and HIPAA, which require safeguarding personal and sensitive information against unauthorized access.

Therefore, failure to patch this vulnerability may result in violations of these standards due to compromised confidentiality, integrity, and availability of protected data.

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