Molti, e a mi avvisto troppi, sottovalutano la sicurezza delle appliazioni limitandosi, nella migliore delle ipotesi, a fare mensilmente il paching di sistema operativo.
Per chi è sicuro che con il patch day di Microsoft sia tutto apposto ecco un elenco  di attacchi alle applicazioni web....   
Consiglio: aggiornate la versione dell'application server alla ultima disponibile con l'ultimo fix di sicurezza, e poi richiedete un web application test. 
dimenticavo... sarebbe bello che qualcuno si occupasse anche si source code analysis..... ma forse è ancora troppo presto per parlarne
Web Application Attacks List :
Arbitrary file access
 Binary planting
 Blind SQL Injection
 Blind XPath Injection
 Brute force attack
 Buffer overflow attack
 Cache Poisoning
 Cash Overflow
 Clickjacking
 Command injection attacks
 Comment Injection Attack
 Content Security Policy
 Content Spoofing
 Credential stuffing
 Cross Frame Scripting
 Cross Site History Manipulation (XSHM)
 Cross Site Tracing
 Cross-Site Request Forgery (CSRF)
 Cross Site Port Attack (XSPA)
 Cross-Site Scripting (XSS)
 Cross-User Defacement
 Custom Special Character Injection
 Denial of Service
 Direct Dynamic Code Evaluation (‘Eval Injection’)
 Execution After Redirect (EAR)
 Exploitation of CORS
 Forced browsing
 Form action hijacking
 Format string attack
 Full Path Disclosure
 Function Injection
 Host Header injection
 HTTP Response Splitting
 HTTP verb tampering
 HTML injection
 LDAP injection
 Log Injection
 Man-in-the-browser attack
 Man-in-the-middle attack
 Mobile code: invoking untrusted mobile code
 Mobile code: non-final public field
 Mobile code: object hijack
 One-Click Attack
 Parameter Delimiter
 Page takeover
 Path Traversal
 Reflected DOM Injection
 Regular expression Denial of Service – ReDoS
 Repudiation Attack
 Resource Injection
 Server-Side Includes (SSI) Injection
 Session fixation
 Session hijacking attack
 Session Prediction
 Setting Manipulation
 Special Element Injection
 SMTP injection
 SQL Injection
 SSI injection
 Traffic flood
 Web Parameter Tampering
 XPATH Injection
 XSRF or SSRF