CVE-2023-48649 : Exploit Details and Defense Strategies

Concrete CMS before 8.5.13 and 9.x before 9.2.2 allows stored XSS on the Admin page via an uploaded file name.

Understanding CVE-2023-48649

This CVE affects Concrete CMS versions prior to 8.5.13 and 9.x before 9.2.2, enabling stored Cross-Site Scripting (XSS) on the Admin page through a maliciously named uploaded file.

What is CVE-2023-48649?

CVE-2023-48649 pertains to a security vulnerability found in Concrete CMS versions which permits stored XSS attacks via the Admin page when a file with a specific name is uploaded.

The Impact of CVE-2023-48649

The impact of this CVE could result in malicious actors executing arbitrary scripts in the context of a user's browser, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2023-48649

Concrete CMS versions earlier than 8.5.13 and 9.x before 9.2.2 are susceptible to stored XSS attacks through file uploads with specific names.

Vulnerability Description

The vulnerability allows attackers to upload files with malicious names, triggering XSS attacks on the Admin page of the CMS.

Affected Systems and Versions

All Concrete CMS instances running versions prior to 8.5.13 and 9.x before 9.2.2 are affected by this vulnerability.

Exploitation Mechanism

By uploading a file with a crafted name, threat actors can exploit this vulnerability to inject and execute malicious scripts within the Admin page.

Mitigation and Prevention

To address CVE-2023-48649 and mitigate the risk of exploitation, follow these security measures:

Immediate Steps to Take

Update Concrete CMS to version 8.5.13 or 9.2.2 or newer to patch the vulnerability.
Educate users to avoid uploading files with suspicious or malicious names.

Long-Term Security Practices

Regularly monitor security advisories and update the CMS promptly to the latest versions.
Utilize web application firewalls to filter out potentially malicious file uploads.

Patching and Updates

Concrete CMS has released versions 8.5.13 and 9.2.2 containing fixes for CVE-2023-48649. It is crucial to apply these updates to secure your CMS against potential XSS attacks.