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Improper input validation
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<p>Improper input validation or unchecked user input is a type of <a href="/facts/Vulnerability_(computing)/jg0Gr71M">vulnerability</a> in <a href="/facts/Computer_software/RP79lVSW">computer software</a> that may be used for <a href="/facts/Security_exploit/EdlqsRJM">security exploits</a>. This vulnerability is caused when "[t]he product does not validate or incorrectly validates input that can affect the control flow or data flow of a program." </p><p>Examples include: </p> <ul><li><a href="/facts/Buffer_overflow/uMFduL4B">Buffer overflow</a></li> <li><a href="/facts/Cross-site_scripting/dhtusKKm">Cross-site scripting</a></li> <li><a href="/facts/Directory_traversal/eLfodPKd">Directory traversal</a></li> <li><a href="/facts/Null_byte_injection/IMYNHNxR">Null byte injection</a></li> <li><a href="/facts/SQL_injection/QD0cwbk5">SQL injection</a></li> <li><a href="/facts/Uncontrolled_format_string/hBvaxceE">Uncontrolled format string</a></li></ul>