It means you're supporting an idea or action alone, without others backing you up.

Risky Support

You are in a vulnerable situation where you might be criticized or fail.

Exposed Position

This idiom does not refer to a physical position but to a metaphorical stance.

It often implies having a distinct, potentially unpopular, stance or opinion.

It suggests a potential risk to personal relationships when defending an opinion.

The phrase often contains an element of internal struggle or doubt.