Rabbi Yosef Chaim Ben Eliyahu from Bagdad paskens here that it is improper and unworthy of her Jewish liniage for a woman to model for pictures for publication. (H/T footnote #7 in the blog post referenced herehere).
(I somehow doubt that this posek is the Halachic basis of the magazines in the question, but it is at least a relevant source to the question).