During an audit of the MapServer version 5.2.1 source code, five vulnerabilities were identified. They include stack and heap overflows, a relative path writing weakness, a file content leakage, as well as a file existence leakage.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/76194/mapserver-overflow.txt
Source: https://packetstormsecurity.com/files/76194/MapServer-Overflow-Underflow-Leakage.html