Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
The Simple:Press plugin for WordPress is vulnerable to arbitrary file modifications in versions up to, and including, 6.8 via the 'file' parameter which does not properly restrict files to be edited in the context of the plugin. This makes it possible with attackers, with high-level permissions such as an administrator, to supply paths to arbitrary files on the server that can be modified outside of the intended scope of the plugin.
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.