Taking Advantage of Another’s Financial Situation…
It is reported that doing business with someone who is compelled (whether to buy or to sell) is forbidden.
‘and do not forget ‘fadl’ (kindness, liberty) between yourselves.’ [al-Baqarah, 237].
Yet people do business (unjustly) with those who are forced to buy or sell due to need, though the Prophet SAWS forbade doing business with one in such circumstances.” (Abu Dawud)
Source: Jami al Ulum wal Hikam, Ibn Rajab