泄漏詳細系統信息將會幫助攻擊者了解系統和制定攻擊計劃。
如果啟用 expose_php 選項，那么由 PHP 解釋器生成的每個響應都會包含主機系統上所安裝的 PHP 版本。了解到遠程服務器上運行的 PHP 版本后，攻擊者就能針對系統枚舉已知的盜取手段，從而大大增加成功發動攻擊的機會。
[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 - Common Weakness Enumeration - (CWE) CWE ID 497
[7] Standards Mapping - Web Application Security Consortium 24 + 2 - (WASC 24 + 2) Information Leakage
[8] M. Achour et al. PHP Manual
[9] PHP Security Consortium PhpSecInfo Test Information
[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