One of the thornier forms of plagiarism nowadays isn't plagiarizing other parties - which does result in repercussions, generally - instead, it's first-party or self-plagiarism.
While it is generally against most codes of conduct to plagiarize your own work (for example, publishing something you published 10 years ago again, without a notice that it has been published before), I have never seen any cases of anyone actually being penalized for doing so, short of issuing a new edition with a citation to the prior work.
While it is generally against most codes of conduct to plagiarize your own work (for example, publishing something you published 10 years ago again, without a notice that it has been published before), I have never seen any cases of anyone actually being penalized for doing so, short of issuing a new edition with a citation to the prior work.