The Mmm Simple File List WordPress plugin through 2.3 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks

The Mmm Simple File List WordPress plugin through 2.3 does not validate the generated path to list files from, allowing any authenticated users, such as subscribers, to list the content of arbitrary directories.