CVE-2023-49791 Explained : Impact and Mitigation

This article provides detailed information about CVE-2023-49791, a vulnerability related to workflows not requiring password confirmation on the API level.

Understanding CVE-2023-49791

This section delves into the specifics of the vulnerability affecting Nextcloud Server.

What is CVE-2023-49791?

CVE-2023-49791 involves a flaw in Nextcloud Server where workflows can be modified or deleted by an attacker without requiring password confirmation through direct API calls.

The Impact of CVE-2023-49791

The vulnerability could allow unauthorized access to modify workflows, potentially leading to data breaches or service interruptions.

Technical Details of CVE-2023-49791

Get insights into the technical aspects of the vulnerability and its implications.

Vulnerability Description

Attackers exploiting this flaw can manipulate workflows on affected Nextcloud Server versions without authentication, posing a significant security risk.

Affected Systems and Versions

Nextcloud Server versions prior to 26.0.9 and 27.1.4, and Nextcloud Enterprise Server versions prior to 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4 are impacted by this vulnerability.

Exploitation Mechanism

By gaining access to an active user session, attackers can circumvent password verification and directly interact with workflows via the API.

Mitigation and Prevention

Learn about steps to mitigate the risks associated with CVE-2023-49791 and prevent potential exploits.

Immediate Steps to Take

Update Nextcloud Server to the patched versions, such as 26.0.9 and 27.1.4 or respective Enterprise Server versions, to remediate the vulnerability.

Long-Term Security Practices

Enforce robust access controls, user authentication mechanisms, and regular security updates to enhance overall system security.

Patching and Updates

Stay informed about security advisories and apply patches promptly to protect against known vulnerabilities.