Executive Summary

The WordPress Plugin HB Audio Gallery Lite version 1.0.0 contains a path traversal vulnerability that allows unauthenticated attackers to download arbitrary files from the server.

This vulnerability occurs because the plugin does not properly sanitize the file_path parameter in requests to the audio-download.php endpoint. Attackers can manipulate this parameter with directory traversal sequences to access files outside the intended gallery directory.

For example, attackers can download sensitive files such as wp-config.php by exploiting this flaw.

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Impact Analysis

This vulnerability can have serious security impacts because it allows unauthenticated attackers to access and download sensitive files from your server.

• Exposure of sensitive configuration files like wp-config.php, which may contain database credentials and other critical information.
• Potential unauthorized access to confidential data stored on the server.
• Increased risk of further attacks due to leaked information.

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Detection Guidance

This vulnerability can be detected by monitoring for suspicious HTTP requests targeting the audio-download.php endpoint of the HB Audio Gallery Lite plugin, specifically those containing directory traversal sequences in the file_path parameter.

A common detection method is to look for requests with patterns like "../" or encoded equivalents in the file_path parameter, which indicate attempts to access files outside the intended directory.

Example commands to detect such attempts in web server logs include:

• Using grep to find traversal attempts in Apache or Nginx logs: grep -i 'audio-download.php' /var/log/apache2/access.log | grep '\.\./'
• Using grep with URL encoded traversal sequences: grep -i 'audio-download.php' /var/log/apache2/access.log | grep '%2e%2e%2f'
• Using a network monitoring tool or IDS to alert on HTTP requests containing "audio-download.php" with suspicious file_path parameters.

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Mitigation Strategies

Immediate mitigation steps include disabling or removing the HB Audio Gallery Lite plugin version 1.0.0 or earlier from your WordPress installation, as it contains the vulnerable audio-download.php endpoint.

If removal is not immediately possible, restrict access to the audio-download.php file by implementing web server rules to block requests containing directory traversal sequences in the file_path parameter.

Additionally, monitor your logs for exploitation attempts and consider applying web application firewall (WAF) rules to block malicious requests targeting this vulnerability.

Since the plugin has been removed from the WordPress repository and no updates are available, migrating to a different, actively maintained audio gallery plugin is recommended.

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Compliance Impact

The vulnerability allows unauthenticated attackers to download arbitrary files, including sensitive configuration files like wp-config.php, by exploiting a path traversal flaw in the HB Audio Gallery Lite WordPress plugin.

Access to such sensitive files could lead to exposure of confidential data or credentials, which may result in non-compliance with data protection regulations such as GDPR or HIPAA that require safeguarding personal and sensitive information.

Therefore, exploitation of this vulnerability could compromise the confidentiality and security of data, potentially violating compliance requirements related to data privacy and protection.

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