CRLF injection vulnerability in YaBB 1 Gold before 1.3.2 allows remote attackers to modify text file contents via the subject variable.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2004-2132
http://www.yabbforum.com/community/YaBB.pl?board=general%3Baction=display%3Bnum=1093133233