Directory traversal vulnerability in Yaws 1.89 allows remote attackers to read arbitrary files via ..\ (dot dot backslash) and other sequences.
https://exchange.xforce.ibmcloud.com/vulnerabilities/62917
https://euvd.enisa.europa.eu/vulnerability/EUVD-2010-4156
http://www.vupen.com/english/advisories/2010/2858
http://www.securityfocus.com/bid/44564
http://www.exploit-db.com/exploits/15371