Arbitrary File Upload Vulnerability in Breeze Cache Plugin for WordPress

CVE-2026-3844

What is CVE-2026-3844?

CVE-2026-3844 is a significant security vulnerability affecting the Breeze Cache plugin used in WordPress environments. This plugin serves the purpose of enhancing website performance by caching static files. The vulnerability stems from inadequate validation of file types in the 'fetch_gravatar_from_remote' function, affecting all versions of the plugin up to and including 2.4.4. As a result, unauthorized users could exploit this flaw to upload arbitrary files to the server hosting the affected WordPress site, which could potentially lead to remote code execution. The exploitation of this vulnerability poses serious risks, particularly since it can be triggered when the "Host Files Locally - Gravatars" feature is enabled, which, while disabled by default, may be activated in certain configurations.

Potential impact of CVE-2026-3844

1. Remote Code Execution: The most severe impact of CVE-2026-3844 is the potential for remote code execution. This allows an attacker to upload malicious scripts or executables that could take control of the server, leading to further compromise of the website and its underlying infrastructure.

2. Data Breach Risks: By exploiting this vulnerability, attackers could gain unauthorized access to sensitive data stored on the affected server. This includes user information, financial data, and other critical assets, potentially leading to data leaks or breaches that can severely damage an organization's reputation and legal standing.

3. Website Integrity and Availability: Once an attacker successfully uploads arbitrary files, they can modify website content, introduce malware, or deploy other attacks on users accessing the website. This can jeopardize the integrity of the website and lead to disruptions in service, ultimately affecting user trust and traffic.

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