If they suspect fraud was the basis for the original refugee status or the green card then yes, they can always instigate an action to revoke the citizenship. Usually, at this point you are fine, it is green card holders who travel to point of origin with asylum granted or refugee status who have trouble retaining their green cards.
This is a general answer only and does not imply that I am your attorney giving advice with full knowledge of all the particulars of your case or that there is any attorney client relationship. I strongly urge you to retain experienced legal counsel who can better advise you once they have reviewed all your documentation and are fully apprised of the details of your case.
Only if your natulalization was procured by means of fraud or other factors like joining the foreign military or treason.
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