SOPE stands for "SKYRiX Object Publishing Environment" and is a framework for mapping dynamic objects into the HTTP infrastructure, that is, the web. A lot of ideas in SOPE are actually inspired by ZOPE (the Z Object Publishing Environment), but the implementation and details are quite different. This is an old version still maintained by upstream.
Binary packages can be installed with the high-level tool pkgin (which can be installed with pkg_add) or pkg_add(1) (installed by default). The NetBSD packages collection is also designed to permit easy installation from source.
The pkg_admin audit command locates any installed package which has been mentioned in security advisories as having vulnerabilities.
Please note the vulnerabilities database might not be fully accurate, and not every bug is exploitable with every configuration.
Problem reports, updates or suggestions for this package should be reported with send-pr.