CVE-2023-30627 : Vulnerability Insights and Analysis

This article provides an overview of CVE-2023-30627, a stored cross-site scripting vulnerability in devices.js of jellyfin-web leading to potential remote code execution.

Understanding CVE-2023-30627

CVE-2023-30627 is a critical vulnerability identified in the jellyfin-web application, version 10.1.0 through 10.8.10, allowing an attacker to perform cross-site scripting attacks with admin privileges.

What is CVE-2023-30627?

The CVE-2023-30627 vulnerability exists in devices.js of jellyfin-web, which serves as the web client for Jellyfin, a media system. By exploiting this flaw, attackers can execute arbitrary commands on the server, posing a serious threat to the confidentiality, integrity, and availability of the system.

The Impact of CVE-2023-30627

The impact of CVE-2023-30627 is critical, with a CVSS base score of 9.1 (Critical). Attackers can leverage this vulnerability to execute malicious code remotely, gaining unauthorized access and potentially compromising sensitive data.

Technical Details of CVE-2023-30627

CVE-2023-30627 involves a stored cross-site scripting vulnerability in devices.js of jellyfin-web, affecting versions from 10.1.0 to 10.8.10.

Vulnerability Description

The vulnerability allows attackers to make arbitrary calls to REST endpoints with admin privileges, leading to potential remote code execution on Jellyfin instances, especially when combined with CVE-2023-30626.

Affected Systems and Versions

Vendor: jellyfin
Product: jellyfin-web
Affected Versions: >= 10.1.0, < 10.8.10

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into the devices.js file, enabling unauthorized access and execution of code on the server.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-30627, immediate actions and long-term security practices are essential.

Immediate Steps to Take

Upgrade to version 10.8.10 of jellyfin-web to apply the necessary patch and eliminate the vulnerability.

Long-Term Security Practices

Regularly update software to the latest versions to ensure patches for known vulnerabilities are applied promptly.

Patching and Updates

Refer to the official GitHub advisories and releases for patches and updates to mitigate the CVE-2023-30627 vulnerability.