Title says it all, but for specifics..
Just found out my thesis advisor published a paper last year using a figure from my thesis. The thesis is in embargo until later this year.
I do have be honest and say that the figure in question is a redraft (with some slight alteration) from an older study. However, it is clear my advisor used the exact file from my thesis work. To his credit, he added a different section on the overall figure, but the part of my redraft is identical and was not altered in any way.
I was not part of the writing process, so it makes sense I'm not an author. However, I thought I'd at least be mentioned in the acknowledgements? Which brings up the bigger question of, are acknowledgements held to the same "ethical regard"? Can you just blatantly use someone's work without giving any credit at all if they didn't do enough to warrant authorship?