/usr/share/gforge/plugins/scmcvs/common/Snoopy.class.php is in fusionforge-plugin-scmcvs 5.3.2+20141104-3+deb8u3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/gforge/plugins/scmcvs/common/../../../../php/libphp-snoopy/Snoopy.class.php