Threat Intelligence Database

MaxSite CMS through 109.6 passes the ci_session cookie to unserialize() without class restrictions, allowing unauthenticated attackers to inject PHP objects. Attackers can forge valid session cookies using the hardcoded encryption key to trigger magic methods and corrupt application state or achieve code execution if gadget classes exist.

MaxSite CMS versions up to and including 109.6 contain a hardcoded session encryption key in the configuration file that is not changed during installation. This vulnerability allows unauthenticated attackers to forge administrator session cookies by computing an HMAC-SHA1 with the known key, bypassing authentication checks and gaining administrator privileges.

MaxSite CMS versions 0.94 through 109.6 have a vulnerability in the admin_page upload handler that allows logged-in users to upload HTML files. These files can contain malicious scripts that execute in visitors' browsers, enabling persistent stored cross-site scripting (XSS) attacks. The vulnerability arises from unrestricted upload of files with dangerous types to the uploads/_pages/ directory.

MaxSite CMS through 109.6 contains a local file inclusion vulnerability in the ajax and require-maxsite dispatchers that allows unauthenticated attackers to execute privileged handler files by supplying base64-encoded path traversal sequences. Attackers can bypass path validation checks and execute admin-gated handler actions without authentication to access sensitive functionality.