The wp-downloadmanager WordPress plugin, in version 1.68.11 (also affecting the 6.9.4 release line), allows an admin-privileged user (current_user_can('manage_downloads')) to upload arbitrary files via download-add.php with no extension or MIME-type validation of any kind - no wp_check_filetype_and_ext(), no validate_file(), and no extension blocklist exist anywhere in the upload handler. The destination path is additionally built by concatenating the raw, unsanitized $_POST['file_upload_to'] value with no traversal check (no ../ filtering, no basename()/realpath() applied). Since the base download path is required to live under WP_CONTENT_DIR (a web-accessible location), an uploaded PHP file lands in a web-servable path and can be directly executed, resulting in remote code execution. The plugin's own later changelog confirms these protections were absent in this version: v1.69 added file-type validation via wp_check_filetype_and_ext(), and v1.69.1 added directory-traversal protection - neither existed in 1.68.11.

The wp-downloadmanager WordPress plugin, in version 1.68.11 (also affecting the 6.9.4 release line), allows an admin-privileged user (current_user_can('manage_downloads')) to upload arbitrary files via download-add.php with no extension or MIME-type validation of any kind - no wp_check_filetype_and_ext, no validate_file, and no extension blocklist exist anywhere in the upload handler.

[{"vendor":"wp-downloadmanager","product":"wp-downloadmanager","defaultStatus":"unknown","programFiles":["download-add.php"],"versions":[{"version":"0","lessThan":"1.69","versionType":"custom","status":"affected"}]}]

[{"vendor":"wp-downloadmanager","product":"wp-downloadmanager","defaultStatus":"unknown","programFiles":["download-add.php"],"versions":[{"version":"0","lessThanOrEqual":"1.69","versionType":"custom","status":"affected"}]}]

{"timestamp":"2026-08-05T12:30:22.625320Z","id":"CVE-2026-18933","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}

The wp-downloadmanager WordPress plugin, in version 1.68.11 (also affecting the 6.9.4 release line), allows an admin-privileged user (current_user_can('manage_downloads')) to upload arbitrary files via download-add.php with no extension or MIME-type validation of any kind - no wp_check_filetype_and_ext(), no validate_file(), and no extension blocklist exist anywhere in the upload handler. The destination path is additionally built by concatenating the raw, unsanitized $_POST['file_upload_to'] value with no traversal check (no ../ filtering, no basename()/realpath() applied). Since the base download path is required to live under WP_CONTENT_DIR (a web-accessible location), an uploaded PHP file lands in a web-servable path and can be directly executed, resulting in remote code execution. The plugin's own later changelog confirms these protections were absent in this version: v1.69 added file-type validation via wp_check_filetype_and_ext(), and v1.69.1 added directory-traversal protection - neither existed in 1.68.11.

AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CWE-434

https://wordpress.org/plugins/wp-downloadmanager/#description

[{"vendor":"wp-downloadmanager","product":"wp-downloadmanager","defaultStatus":"unknown","programFiles":["download-add.php"],"versions":[{"version":"0","lessThan":"1.69","versionType":"custom","status":"affected"}]}]