CVE-2023-52083 : Security Advisory and Response

A stored XSS vulnerability was discovered in WinterCMS, an open-source content management system, allowing attackers to execute malicious scripts via the Media Manager functionality.

Understanding CVE-2023-52083

WinterCMS version 1.2.4 and below are impacted by a stored XSS vulnerability that arises from improper neutralization of user input during the file renaming process in the Media Manager.

What is CVE-2023-52083?

The vulnerability, tracked as CWE-79, allows users with specific permissions to upload files to the Media Manager and execute arbitrary scripts by renaming the files. Attackers could exploit this to launch stored cross-site scripting (XSS) attacks.

The Impact of CVE-2023-52083

The impact of this vulnerability is rated as low severity with high privileges required. Successful exploitation could lead to the execution of malicious scripts in the context of the user's browser, potentially compromising sensitive data.

Technical Details of CVE-2023-52083

This section provides an insight into the vulnerability's description, affected systems, and the exploitation mechanism.

Vulnerability Description

WinterCMS prior to version 1.2.4 did not properly sanitize user input during the file renaming process in the Media Manager, allowing threat actors to inject and execute malicious scripts.

Affected Systems and Versions

WinterCMS versions prior to 1.2.4 are affected by this stored XSS vulnerability through privileged upload of files via the Media Manager.

Exploitation Mechanism

Attackers with the

media.manage_media

permission could upload files to the Media Manager and execute arbitrary scripts by renaming the files, leveraging the lack of input neutralization during this process.

Mitigation and Prevention

To safeguard systems from CVE-2023-52083, immediate steps should be taken to mitigate the risk and prevent exploitation.

Immediate Steps to Take

Users are advised to update WinterCMS to version 1.2.4 or later to patch the vulnerability and prevent stored XSS attacks. Additionally, restrict user permissions and sanitize user input to mitigate risks.

Long-Term Security Practices

Implement security best practices such as regular security audits, monitoring user permissions, and educating users on safe file handling procedures to enhance overall system security.

Patching and Updates

Stay informed about security updates and patches released by WinterCMS. Regularly update the CMS to the latest version to ensure that known vulnerabilities are addressed and system security is maintained.