The CGIHTTPServer module in Python 2.7.5 and 3.3.4 does not properly handle URLs in which URL encoding is used for path separators, which allows remote attackers to read script source code or conduct directory traversal attacks and execute unintended code via a crafted character sequence, as demonstrated by a %2f separator.
The CGIHTTPServer module in Python
Vulnerability
CVE-2014-4650
NVD
Refer to CVE-2014-4650 NVD advisory