Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
When in maintenance mode, Magento version 2.4.0 and 2.3.4 (and earlier) are affected by an information disclosure vulnerability that could expose the installation path during build deployments. This information could be helpful to attackers if they are able to identify other exploitable vulnerabilities in the environment.
CWE-22 - Path Traversal
Path traversal (or directory traversal), is a vulnerability that allows malicious users to traverse the server's root directory, gaining access to arbitrary files and folders such as application code & data, back-end credentials, and sensitive operating system files. In the worst-case scenario, an attacker could potentially execute arbitrary files on the server, resulting in a denial of service attack. Such an exploit may severely impact the integrity, confidentiality, and availability of an application.