void CUser::SetClientEncoding(const CString& s) {
    m_sClientEncoding = CZNC::Get().FixupEncoding(s);
    for (CClient* pClient : GetAllClients()) {
        pClient->SetEncoding(m_sClientEncoding);
    }
}
The product receives input or data, but it does
        not validate or incorrectly validates that the input has the
        properties that are required to process the data safely and
        correctly.