License

• The licensor cannot revoke these freedoms if you follow the license terms.

Under the following terms:

• Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

• No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.

CC BY (Attribution)

As mentioned, CC BY grants an unrestricted license to use the respective content. How the content is used, e.g. in original or modified form, by whom, or for what purpose, is irrelevant. According to section 3a of the legal code the following obligations must be met:

The author and other parties designated to receive attribution must be named in the manner requested by the licenser as long as the requested form of attribution is reasonable.
If supplied by the licenser, copyright notices, a reference to the CC license (preferably as a link to the CC website), a notice that refers to the disclaimer of warranty and liability and a link to the source must be retained.
If the work is shared in an adapted version, it must be indicated that it is a modified version. Former indications to modifications must be retained (section 3.a.1.B of the legal code).
If the licenser requests to remove any of the information referred to in paragraph 2 above, the user has to do so as long as it is reasonable.
The licensee must not create the impression that their use is in any way endorsed by the licenser or any party designated to receive attribution (section 2.a.6 of the legal code).