The Random Cookie Password functionality in the loaduser function in cgi-bin/cgi-lib/subs.pl in web-app.org WebAPP before 0.9.9.7 does not clear the (1) username, (2) password, (3) usertheme, and (4) userlang cookies for unauthorized users, which has unknown impact and remote attack vectors.
http://www.web-app.org/downloads/WebAPPv0.9.9.7.zip
http://www.web-app.org/cgi-bin/index.cgi?action=forum&board=how_to&op=display&num=9458