Multiple cross-site scripting (XSS) vulnerabilities in PhotoPost PHP Pro 4.6.x and earlier allow remote attackers to inject arbitrary web script or HTML via the (1) ppuser, (2) password, (3) stype, (4) perpage, (5) sort, (6) page, (7) si, or (8) cat parameters to showmembers.php, or the (9) photo name, (10) photo description, (11) album name, or (12) album description fields.