Here is a link that lists solubility in water as less than 0.1 mg/mL so I would call it insoluble but use the guidelines set up by your instructor as to whether it is soluble or not. Of course it is soluble in HCl (since it is a base) and I wouldn't expect it to be soluble in NaOH if it isn't soluble in water.
http://en.wikipedia.org/wiki/4-Nitroaniline
Is m-nitroaniline soluble in water, 1.0M NaOH, 1.0M HCl?
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