Google Webmaster tool show strange error pages ??

[shakemelikeapig]

My Google Webmaster tool show many crawler 403 error. Number of error
are increasing by the time. All of them are ugly and strange URLs like
this:

Quote:

/blog/product-A-revi%3C/td%3E%3Ctd%20width='70'%3E2010-09-20%3C/td%3E%3Ctd%20width='5'%3E%3Ca%20href='ilist.php4?p
age=&job=login&board_idx=88&memo_idx=911&Bcode=ibo
ard&Bpage=13&Bkey=title&Bkeyword=&prev=1&nextype=m
emo_del'%3E%3Cimg%20src='/jboard/img/del_icon.gif'%20border='0'%3E%3C/a%3E%3C/td%3E%20%20%3C/tr%3E%3C/table%3E%20%20%3C/td%3E%3C/tr%3E%3Ctr%3E%20%20%3Ctd%20height='18'%3E%3Ctable%
20width='95%'%20border='0'%20cellpadding='1'%20cel
lspacing='0'%3E%20%20%3Ctr%3E%3Ctd%20width='80'%20
align='center'%3EViagra%3C/td%3E%3Ctd%3Ewsjeqvakrjcntrbwrhuh,%20%3Ca%20href=

I dont understand how the hell these kind of URL can be submitted go Google crawler Do it affect my ranking ? How to fix this



My site is a Wordpress blog.