Directory traversal vulnerability in index.php in (1) WSN Forum 4.1.43 and earlier, (2) Gallery 4.1.30 and earlier, (3) Knowledge Base (WSNKB) 4.1.36 and earlier, (4) Links 4.1.44 and earlier, and possibly (5) Classifieds before 4.1.30 allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the TID parameter, as demonstrated by uploading a .jpg file containing PHP sequences.