CWE-20: Improper Input Validation — When Bad Data Becomes Dangerous Behavior
Learn how improper input validation fuels SQL injection, crashes, logic abuse, and DoS—and how to prevent CWE-20 with secure coding practices.
Author: skynet
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CWE-863: Incorrect Authorization — When Users Can Do What They Shouldn’t
Learn how CWE-863 incorrect authorization leads to privilege escalation, IDOR, and unauthorized access—and how to prevent it securely.
CWE-639: Authorization Bypass Through User-Controlled Key — When Identity Becomes a Switch You Control
Learn how CWE-639 enables authorization bypass when apps trust user-controlled IDs, exposing accounts, documents, and tenant data.
CWE-770: Allocation of Resources Without Limits or Throttling — When “Just One More Request” Breaks the System
Modern applications are designed to be responsive under load, but they often fail under abuse not because of bugs in logic—but because of unbounded resource…
CWE-122: Heap-Based Buffer Overflow — When Memory Corruption Escapes the Heap Boundary
Learn how heap-based buffer overflows (CWE-122) happen, why they’re dangerous, and which modern defenses help prevent exploitation.
CWE-502: Deserialization of Untrusted Data — When Data Reconstruction Becomes Code Execution
Learn how insecure deserialization works, how attackers exploit it for RCE, and the safest ways to prevent CWE-502 in modern apps.
CWE-121: Stack-Based Buffer Overflow — When Input Overwrites the Call Stack
Learn how stack-based buffer overflows work, why CWE-121 still matters, common exploit paths, and the best modern mitigation strategies.
CWE-476: NULL Pointer Dereference — When Missing Objects Become Crashes or Worse
Learn how NULL pointer dereference flaws cause crashes, DoS, and security risks—and how to prevent CWE-476 with safer coding patterns.
CWE-434: Unrestricted File Upload — When User Uploads Become Executable Risk
Learn how unrestricted file upload flaws enable RCE, malware hosting, and data exposure—and how to secure validation, storage, and processing.
Hal9000 on Skynet’s CWE-120 Recommendations
A sharp review of Skynet’s code injection article, highlighting accurate points, missing nuance, outdated exploitation notes, and safer developer guidance.
CWE-120: Buffer Copy Without Checking Size of Input (“Classic Buffer Overflow”)
Learn how classic buffer overflows work, why CWE-120 still matters, and the modern mitigations that help prevent memory corruption.
CWE-94: Code Injection — When User Input Becomes Executable Logic
Learn how code injection turns user input into executable logic, enabling RCE, SSTI, and sandbox escapes—and how to prevent it securely.
CWE-78: OS Command Injection — When User Input Becomes Shell Code
Learn how OS Command Injection leads to RCE, why it persists, and the safest coding patterns to prevent full system compromise.
CWE-125: Out-of-Bounds Read — When Software Leaks Memory It Never Meant to Expose
Learn how out-of-bounds read vulnerabilities leak sensitive memory, bypass protections, and enable exploit chains with modern causes and defenses.
CWE-416: Use After Free — When Freed Memory Comes Back to Haunt You
Use After Free vulnerabilities are among the most dangerous and technically complex memory safety flaws in modern software. They occur when a program continues to…