What is the legal character of a right of appeal under the CPC?

An appeal requires authority of law, so it is "A statutory right requiring legal authority". In Ganga Bai v. Vijay Kumar, the Supreme Court distinguished the right to institute a civil suit from the right of appeal and described appeal as a statutory creation; mere dissatisfaction with a finding does not itself create an appeal, and the CPC defines and limits available appeals through its provisions.