The Simple Download Monitor WordPress plugin before 3.9.5 allows users with a role as low as Contributor to download any file on the web server (such as wp-config.php) via a path traversal vector.

The Simple Download Monitor WordPress plugin before 3.9.9 does not enforce nonce checks, which could allow attackers to perform CSRF attacks to 1) make admins export logs to exploit a separate log disclosure vulnerability (fixed in 3.9.6), 2) delete logs (fixed in 3.9.9), 3) remove thumbnail image from downloads

The Simple Download Monitor WordPress plugin before 3.9.11 could allow users with a role as low as Contributor to perform Stored Cross-Site Scripting attack via 1) "color" or "cssclass" argument of sdmdownload shortcode, 2) "class" or "placeholder" argument of sdmsearchform shortcode.

The Simple Download Monitor WordPress plugin before 3.9.6 allows users with a role as low as Contributor to remove thumbnails from downloads they do not own, even if they cannot normally edit the download.

The Simple Download Monitor WordPress plugin before 3.9.5 does not escape the 1) sdmactivetab GET parameter and 2) sdmstatsstartdate/sdmstatsenddate POST parameters before outputting them back in attributes, leading to Reflected Cross-Site Scripting issues

The Simple Download Monitor WordPress plugin before 3.9.6 saves logs in a predictable location, and does not have any authentication or authorisation in place to prevent unauthenticated users to download and read the logs containing Sensitive Information such as IP Addresses and Usernames

The Simple Download Monitor WordPress plugin before 3.9.5 does not escape the "File Thumbnail" post meta before outputting it in some pages, which could allow users with a role as low as Contributor to perform Stored Cross-Site Scripting attacks. Given the that XSS is triggered even when the Download is in a review state, contributor could make JavaScript code execute in a context of a reviewer such as admin and make them create a rogue admin account, or install a malicious plugin