Language: JavaScript
Label: safe
CWE: CWE-331 \u2014 Insufficient Entropy
The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.

Code:
function prepareMessagePayload(modules, messagePayload) {
    var stringifiedPayload = JSON.stringify(messagePayload);
    if (modules.cryptoModule) {
        var encrypted = modules.cryptoModule.encrypt(stringifiedPayload);
        stringifiedPayload = typeof encrypted === 'string' ? encrypted : (0, base64_codec_1.encode)(encrypted);
        stringifiedPayload = JSON.stringify(stringifiedPayload);
    }
    return stringifiedPayload || '';
}