CVE-2023-6826 Explained : Impact and Mitigation

This CVE-2023-6826 article provides detailed information about a vulnerability found in the E2Pdf plugin for WordPress, which allows authenticated attackers to upload arbitrary files on the affected site's server, potentially leading to remote code execution.

Understanding CVE-2023-6826

The E2Pdf plugin for WordPress has a vulnerability that enables arbitrary file uploads due to insufficient file type validation on the 'import_action' function in versions up to and including 1.20.25. This could be exploited by authenticated attackers with specific roles granted access by the administrator.

What is CVE-2023-6826?

The CVE-2023-6826 vulnerability is classified under CWE-434, indicating an unrestricted upload of a file with a dangerous type. In this case, the flaw in the E2Pdf plugin for WordPress allows attackers to upload arbitrary files on the server, potentially leading to severe consequences like remote code execution.

The Impact of CVE-2023-6826

This vulnerability poses a high severity risk with a CVSSv3.1 base score of 7.2 (High). If successfully exploited, attackers could gain unauthorized access to the server, execute malicious code, steal sensitive information, or disrupt the website's normal operation.

Technical Details of CVE-2023-6826

The following technical details outline specifics of the vulnerability:

Vulnerability Description

The vulnerability in the E2Pdf plugin for WordPress arises from insufficient validation of file types in the 'import_action' function, allowing authenticated attackers to upload arbitrary files on the server.

Affected Systems and Versions

Vendor: oleksandrz
Product: E2Pdf – Export To Pdf Tool for WordPress
Versions Affected: Up to and including 1.20.25
Version Type: Semver
Default Status: Unaffected

Exploitation Mechanism

Authenticated attackers with specific role-based access can leverage this vulnerability to upload arbitrary files on the server, potentially leading to remote code execution scenarios.

Mitigation and Prevention

To address the CVE-2023-6826 vulnerability, consider implementing the following mitigation strategies:

Immediate Steps to Take

Update the E2Pdf plugin to version 1.20.26 or above, which contains a patch addressing the arbitrary file upload vulnerability.
Limit user privileges and roles to minimize the impact of potential attacks.
Monitor server logs and file uploads for any suspicious activity.

Long-Term Security Practices

Regularly update all plugins and software to the latest versions to patch security vulnerabilities.
Conduct security audits and penetration testing to identify and address any potential vulnerabilities proactively.
Educate users on secure practices such as avoiding file uploads from untrusted sources.

Patching and Updates

Ensure timely application of patches and security updates released by the plugin vendor to protect against known vulnerabilities like CVE-2023-6826. Regularly check for security advisories and follow best practices to safeguard your WordPress environment.