You may have heard about the malware threat that caused a security flaw in the WeChat app. It only affects iOS users, and only those on version 6.2.5.
To protect yourself from this threat, just update your WeChat app to version 6.2.6.
The WeChat team is closely monitoring the situation, but have assured users that there has been no theft or leakage of information pertaining to users' private details/money.
Check out their Official Blog post here.