元數據可幫助攻擊者了解系統和制定攻擊計劃。
WCF 服務可配置為顯示元數據。元數據會提供詳細的服務描述信息，不應在生產環境中廣播。ServiceMetaData 類的 HttpGetEnabled / HttpsGetEnabled 屬性可定義服務是否會顯示元數據。
例 1：以下代碼指示 WCF 廣播服務的元數據。
ServiceMetadataBehavior smb = new ServiceMetadataBehavior();
smb.HttpGetEnabled = true;
smb.HttpGetUrl = new Uri(EndPointAddress);
Host.Description.Behaviors.Add(smb);
[1] Standards Mapping - OWASP Top 10 2004 - (OWASP 2004) A10 Insecure Configuration Management
[2] Standards Mapping - OWASP Top 10 2007 - (OWASP 2007) A6 Information Leakage and Improper Error Handling
[3] Standards Mapping - OWASP Top 10 2010 - (OWASP 2010) A6 Security Misconfiguration
[4] Standards Mapping - Security Technical Implementation Guide Version 3 - (STIG 3) APP3620 CAT II
[5] Standards Mapping - Security Technical Implementation Guide Version 3.4 - (STIG 3.4) APP3620 CAT II
[6] Standards Mapping - FIPS200 - (FISMA) CM
[7] Standards Mapping - Common Weakness Enumeration - (CWE) CWE ID 215
[8] Standards Mapping - Web Application Security Consortium 24 + 2 - (WASC 24 + 2) Information Leakage
[9] Metadata Publishing Behavior Microsoft Developer Network (MSDN)
[10] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 - (PCI 1.1) Requirement 6.5.10
[11] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 - (PCI 2.0) Requirement 6.5.5
[12] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 - (PCI 1.2) Requirement 6.5.6