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Rabbi Ovadia Yosef, zt’l in Yechaveh Da’as III #67 indicates that a woman who dresses immodestly violates lifnei eiver.
How/why does a woman dressing immodestly transgress the prohibition of lifnei eiver? If it does not please cite sources to this effect as well.
Since a man is prohibited to stare at a woman, dressing immodestly in front of men provides them with the tool to sin, let alone what the stare can lead to (improper thoughts, etc.) That seems almost self-evident, especially if she is doing it "to be seen". In other words doing it to draw attention to herself.
[I guess what is self evident to me isn't so self-evident to others. So let's start with adding in one more case of Lifnei Iver - a parent hitting an older child. The parent is in the room, all the tools needed are there. But he isn't violating Lifnei Iver just by being in the room. Rather by hitting the child, thus doing something that has a foreseeable consequence of motivating him to do an aveira, he violates Lifnei Iver. This seems to me to be directly analogous to a woman dressing untznius to be noticed. To clarify, I am speaking here about the fact that the untznius draws attention, so that would mean that not all levels of untznius draw attention (or cause hirrur) (e.g. a married woman with uncovered hair being the classic example), so that would limit the statement of when it is lifnei iver. And let me be further clear that I am not saying it is self evident that it violates Lifnei Iver, I'm saying that if it does, it is seems to me to be self evident because of this reason].
Double AA brings up a good point that for something to be Lifnei Iver it may have to be through providing something that was otherwise unavailable. Note that there are opinions that this is a Rabbinic prohibition regardless. It would also get into questions of what is "otherwise available" in this context (on the street, walking past teenagers, etc.).
Even if not, the common prayer every night is that no person should be punished because of me. So even if it weren't a technical problem (from Lifnei Iver), it still has an undesirable aspect to it.
