(SANS) List Developers should know !

Source: http://www.sans.org/top25errors/ [4]

CATEGORY: Insecure Interaction Between Components
CWE-20: Improper Input Validation
CWE-116: Improper Encoding or Escaping of Output
CWE-89: Failure to Preserve SQL Query Structure (aka 'SQL Injection')
CWE-79: Failure to Preserve Web Page Structure (aka 'Cross-site Scripting')
CWE-78: Failure to Preserve OS Command Structure (aka 'OS Command Injection')
CWE-319: Cleartext Transmission of Sensitive Information
CWE-352: Cross-Site Request Forgery (CSRF)
CWE-362: Race Condition
CWE-209: Error Message Information Leak

CATEGORY: Risky Resource Management
CWE-119: Failure to Constrain Operations within the Bounds of a Memory Buffer
CWE-642: External Control of Critical State Data
CWE-73: External Control of File Name or Path
CWE-426: Untrusted Search Path
CWE-94: Failure to Control Generation of Code (aka 'Code Injection')
CWE-494: Download of Code Without Integrity Check
CWE-404: Improper Resource Shutdown or Release
CWE-665: Improper Initialization
CWE-682: Incorrect Calculation

CATEGORY: Porous Defenses
CWE-285: Improper Access Control (Authorization)
CWE-327: Use of a Broken or Risky Cryptographic Algorithm
CWE-259: Hard-Coded Password
CWE-732: Insecure Permission Assignment for Critical Resource
CWE-330: Use of Insufficiently Random Values
CWE-250: Execution with Unnecessary Privileges
CWE-602: Client-Side Enforcement of Server-Side Security