CVE-2023-25150 : What You Need to Know

This CVE-2023-25150 involves a vulnerability where the document content of files can be obtained through Collabora for files of other users in Nextcloud office/richdocuments. It has been assigned a CVSS base score of 5.8, categorizing it as a medium severity issue.

Understanding CVE-2023-25150

This section delves into the specifics of CVE-2023-25150, highlighting what the vulnerability entails and its impact.

What is CVE-2023-25150?

In affected versions, the Collabora integration in Nextcloud can be manipulated to provide unauthorized access to files without proper permission validation. This could allow any user with access to Collabora to view the content of other users' files, potentially compromising sensitive information.

The Impact of CVE-2023-25150

The impact of this vulnerability is significant, as it exposes sensitive document content to unauthorized users, violating data privacy and security measures. It is crucial to address this issue promptly to prevent potential data breaches and unauthorized access.

Technical Details of CVE-2023-25150

This section provides technical insights into the vulnerability, including its description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

CVE-2023-25150 is classified as an improper access control vulnerability (CWE-284) due to the lack of proper validation during document access through Collabora in Nextcloud office/richdocuments.

Affected Systems and Versions

The vulnerability impacts Nextcloud's security-advisories product across multiple versions, ranging from < 3.8.7 to >= 7.0.0, < 7.0.2. Users utilizing affected versions are at risk of unauthorized access to their files via Collabora integration.

Exploitation Mechanism

Exploiting this vulnerability involves leveraging the Collabora integration in Nextcloud to bypass permission checks and gain unauthorized access to document content stored on the platform.

Mitigation and Prevention

In response to CVE-2023-25150, it is crucial to implement immediate steps to address the vulnerability, establish long-term security practices, and apply necessary patches and updates to mitigate the risk effectively.

Immediate Steps to Take

Users and administrators are advised to update the Nextcloud Office App (Collabora Integration) to the recommended versions: 7.0.2 (Nextcloud 25), 6.3.2 (Nextcloud 24), 5.0.10 (Nextcloud 23), 4.2.9 (Nextcloud 21-22), or 3.8.7 (Nextcloud 15-20) to prevent exploitation of the vulnerability.

Long-Term Security Practices

To enhance the overall security posture, organizations should implement robust access control measures, conduct regular security assessments, and educate users on data security best practices to prevent similar vulnerabilities in the future.

Patching and Updates

Regularly monitoring for security advisories and promptly applying patches and updates provided by Nextcloud can help in addressing known vulnerabilities and strengthening the security of the platform against potential threats.