Language: JavaScript
Label: vulnerable
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 __processMessage(modules, message) {
    var config = modules.config, crypto = modules.crypto;
    if (!config.cipherKey)
        return message;
    try {
        return crypto.decrypt(message);
    }
    catch (e) {
        return message;
    }
}