CVE-2023-0829 : Exploit Details and Defense Strategies

This CVE-2023-0829 was published by INCIBE on September 20, 2023. It involves a Cross-Site Scripting vulnerability in Plesk versions 17.0 through 18.0.31.

Understanding CVE-2023-0829

This vulnerability allows a malicious subscription owner to compromise the server if an administrator visits a specific page in Plesk related to the malicious subscription.

What is CVE-2023-0829?

The CVE-2023-0829 involves a Cross-Site Scripting vulnerability in Plesk versions 17.0 through 18.0.31. It can lead to a full compromise of the server by a malicious subscription owner if an administrator accesses a particular page.

The Impact of CVE-2023-0829

The impact of CVE-2023-0829 is rated as HIGH. The confidentiality, integrity, and availability of the system are all at risk due to this vulnerability, with a base score of 8.8.

Technical Details of CVE-2023-0829

The vulnerability is classified under CWE-79 - Improper Neutralization of Input During Web Page Generation (Cross-site Scripting). It has a CVSSv3.1 base severity rating of HIGH.

Vulnerability Description

The vulnerability in Plesk versions 17.0 through 18.0.31 allows a malicious subscription owner to execute arbitrary scripts in the context of the administrator's session.

Affected Systems and Versions

Plesk versions 17.0 through 18.0.31 are affected by this Cross-Site Scripting vulnerability.

Exploitation Mechanism

A malicious subscription owner can exploit this vulnerability to inject and execute malicious scripts when an administrator accesses a specific page related to the malicious subscription.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-0829, immediate action and long-term security practices are crucial.

Immediate Steps to Take

Update Plesk to the latest supported version where the vulnerability has been patched.
Implement strict access controls and regularly review user permissions within Plesk to prevent unauthorized access.

Long-Term Security Practices

Regularly monitor and audit for any suspicious activity within Plesk.
Educate users on safe browsing practices and the risks associated with clicking on unknown links.

Patching and Updates

The vulnerability is fixed in the latest supported versions of Plesk. It is recommended to keep Plesk updated to ensure protection against known vulnerabilities.