CEUR-WS has adopted the Creative Commons CC-BY 4.0 license (https://creativecommons.org/licenses/by/4.0/) for papers and volumes published on CEUR-WS.org.
It is important to to understand the difference between the legal provisions of CC-BY (see above) and the academic rules for publishing papers. The latter cover among other plagiarism, which is not so much a concern of CC-BY. CC-BY is a very liberal license. It supports the open-access publication chain by authorizing the publishers and users to store, access and distribute the papers.
CC-BY does not prevent certain undesired uses. For example, a third person could select a number of CC-BY-licensed papers and republish them in a book, as long as the clauses of CC-BY are not violated. This may not even require consent by the authors. Clearly, this is against academic standards. So, sanctions should be considered within the rule system of academia, e.g. by designating such a publisher as predatory.
Overall, the advantages of CC-BY are stronger than its disadvantages. CC-BY is the defacto standard for open-access publishing. Let’s hope that we get an improved version CC-BY 5.0 where some of the concerns are addressed.