CVE-2023-7164 in BackWPup Plugin
Summary
by MITRE • 04/08/2024
The BackWPup WordPress plugin before 4.0.4 does not prevent visitors from leaking key information about ongoing backups, allowing unauthenticated attackers to download backups of a site's database.
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Analysis
by VulDB Data Team • 08/30/2024
The BackWPup WordPress plugin vulnerability CVE-2023-7164 represents a critical information disclosure flaw that undermines the security posture of WordPress installations. This vulnerability affects versions prior to 4.0.4 and exposes sensitive backup data to unauthenticated attackers through improper access controls. The flaw allows malicious actors to exploit the plugin's backup functionality without requiring any authentication credentials, creating a significant risk for WordPress site administrators who rely on this popular backup solution. The vulnerability specifically targets the plugin's handling of backup file access permissions, where the system fails to properly validate user credentials before allowing download access to backup archives.
The technical implementation of this vulnerability stems from inadequate input validation and access control mechanisms within the plugin's backup download functionality. When users attempt to access backup files through the plugin's interface, the system does not properly verify whether the requesting user possesses the necessary privileges to access the requested backup data. This design flaw creates a path for attackers to directly access backup files by manipulating URL parameters or through direct file access attempts. The vulnerability operates at the application layer and can be exploited through standard web browser interactions, making it particularly dangerous as it requires no specialized tools or advanced technical knowledge to execute successfully. This weakness aligns with CWE-284, which addresses improper access control issues in software systems where insufficient authorization checks allow unauthorized access to protected resources.
The operational impact of CVE-2023-7164 extends far beyond simple data leakage, as database backups typically contain sensitive information including user credentials, personal data, system configurations, and potentially proprietary business information. Attackers who successfully exploit this vulnerability can gain access to complete database snapshots, which may contain hashed passwords, session tokens, and other authentication-related data that could be used for further attacks. The exposure of backup files creates opportunities for attackers to perform credential stuffing attacks, escalate privileges within the WordPress installation, or extract sensitive information for potential monetization. This vulnerability particularly affects WordPress sites that store large amounts of user data or business-critical information, as the backup files represent a goldmine of potentially valuable data for cybercriminals.
Organizations and WordPress administrators should immediately implement mitigation strategies to address this vulnerability while awaiting the official patch release. The most effective immediate solution involves applying the plugin update to version 4.0.4 or later, which contains the necessary access control fixes. Additionally, administrators should consider implementing web application firewall rules to block direct access to backup file paths and ensure that backup files are stored outside the web root directory. Network-level protections such as rate limiting and access control lists can help reduce the risk of automated exploitation attempts. The vulnerability demonstrates the importance of proper access control implementation and highlights the need for regular security assessments of third-party plugins. From an ATT&CK framework perspective, this vulnerability maps to techniques involving credential access and data extraction, where adversaries can leverage information disclosure to obtain sensitive data for subsequent exploitation phases. Organizations should also consider implementing monitoring solutions to detect unauthorized access attempts to backup files and establish incident response procedures for potential data exposure events.