Beauty is always subjective but because of our evolutionary traits most of us find similar features attractive creating the illusion of some objectivity.
In some contexts because of these shared views we can call some traits objectively beautiful in a conversational context.
But fundamentally things like beauty can never be objective as that would imply that any creature would find these same traits beautiful.
Same applies to any similar adjectives like good, tasty etc.

EDIT:

In summary calling that woman ugly is wrong if your idea of right is what most people think.
Obviously it's not "wrong" to call her ugly, just unconventional.

Confusing common views and ideals as objective truths just because they are commonly shared is basically the lowest kind of intellectual mistake one can perform.