SQL injection vulnerability in bb-includes/formatting-functions.php in bbPress before 0.8.1 might allow remote attackers to execute arbitrary SQL commands via unspecified vectors to forums/bb-edit.php, as demonstrated by a PRE element, aka the "quircky slashes bug."
http://www.vupen.com/english/advisories/2007/2219
http://www.securityfocus.com/bid/24488
http://trac.bbpress.org/ticket/592
http://trac.bbpress.org/changeset/717