Application Security
CWE-841 Improper Enforcement of Behavioral Workflow
When steps must happen in order and the server does not check, attackers skip or reorder them. CWE-841 explains workflow bypass and how to enforce state.
Oct 18, 20262 min read
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CWE-84 XSS with Encoded URI Schemes: Why Filters Miss Them
The javascript scheme can be written in encoded forms that slip past a naive filter. CWE-84 explains the bypass and why canonicalizing first is the fix.
Oct 18, 20262 min read
Application Security
CWE-839 Numeric Range Comparison Without Minimum Check
Checking only the maximum lets negative numbers through. CWE-839 turns a missing lower bound into memory corruption in C and C++. Here is the fix.
Oct 18, 20262 min read
Application Security
CWE-838 Inappropriate Encoding for Output Context: Causes and Fixes
When you encode output one way and the receiver decodes another way, data turns into commands. CWE-838 explains encoding mismatches and how to prevent them.
Oct 18, 20262 min read
Application Security
CWE-837 Improper Enforcement of a Single, Unique Action
Votes, refunds and seat locks that should happen once can be repeated. CWE-837 is a business logic flaw. Here is how to enforce once only rules server side.
Oct 18, 20262 min read
Application Security
CWE-836 Use of Password Hash Instead of Password for Authentication
If the client sends the hash and the server compares it to the stored hash, a stolen hash is as good as the password. Here is how CWE-836 works.
Oct 18, 20262 min read
Application Security
CWE-835 Infinite Loop: Unreachable Exit Conditions in Parsers
A crafted packet or file can leave a loop with no way out. CWE-835 explains how infinite loops arise in network code and how to stop them.
Oct 18, 20263 min read
Application Security
CWE-834 Excessive Iteration: Loops an Attacker Can Stretch
A loop does not need to be infinite to take a service down. CWE-834 covers unbounded iteration driven by attacker input and how to cap it.
Oct 18, 20262 min read
Application Security
CWE-833 Deadlock: When Threads Wait for Each Other Forever
Deadlock is a denial of service you build yourself. CWE-833 explains lock ordering problems, the impact, and the habits that prevent a hang.
Oct 18, 20262 min read
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