CVE-2009-4487

nginx 0.7.64 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.

CVE-2011-4968

nginx http proxy module does not verify peer identity of https origin server which could facilitate man-in-the-middle attack (MITM)