/usr/share/java/stapler-adjunct-codemirror.jar is in libstapler-adjunct-codemirror-java 1.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/../maven-repo/org/kohsuke/stapler/stapler-adjunct-codemirror/1.1/stapler-adjunct-codemirror-1.1.jar