Unspecified vulnerability in Jelsoft vBulletin before 3.6.6, when unauthenticated User Infraction Permissions is disabled, allows remote attackers to see the infraction "red flag" for a deleted user.
member2.php in vBulletin 2.2.9 and earlier does not properly restrict the $perpage variable to be an integer, which causes an error message to be reflected back to the user without quoting, which facilitates cross-site scripting (XSS) and possibly other attacks.