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vulnerable code #5

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vulnerable code #5

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19 changes: 4 additions & 15 deletions hello.js
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Original file line number Diff line number Diff line change
@@ -1,17 +1,6 @@
//Issues before the repo was added to Codacy
console.log("ola");
console.log("olaaa");

console.log('ola2');
console.log("olaaa2");
var username = "admin";

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Codacy Development / Codacy Static Code Analysis

hello.js#L2 

Unexpected var, use let or const instead.
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⚠️ Codacy found a medium Code Style issue: Unexpected var, use let or const instead.

The issue here is that the var keyword is considered outdated and has been largely replaced by let and const in modern JavaScript development. The var keyword has function scope and can lead to unexpected behavior due to variable hoisting. On the other hand, let and const have block scope, which makes the code more predictable and easier to maintain.

In this case, since the value of username does not change, it is more appropriate to use const.

Here's the single line change suggestion:

Suggested change
var username = "admin";
const username = "admin";

This comment was generated by an experimental AI tool.

var password = "' OR '1'='1";

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hello.js#L3 

Unexpected var, use let or const instead.
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⚠️ Codacy found a medium Code Style issue: Unexpected var, use let or const instead.

The issue identified by the ESLint linter is that the var keyword is used to declare the password variable. The var keyword is considered outdated and has been largely replaced by let and const in modern JavaScript for better scoping and to avoid hoisting issues. const should be used when the variable's value will not change, and let should be used when the value might change.

In this case, since the password variable is not intended to be reassigned, const is the appropriate choice.

Here is the code suggestion to fix the issue:

Suggested change
var password = "' OR '1'='1";
const password = "' OR '1'='1";

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//Add 2 more
console.log('ola3');
//Fixes one

//Add 1 that is not merged
console.log('ola5');

//test
test
//test
var query = "SELECT * FROM users WHERE username='" + username + "' AND password='" + password + "'";

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hello.js#L5 

'query' is assigned a value but never used.

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Codacy Development / Codacy Static Code Analysis

hello.js#L5 

'query' is assigned a value but never used.

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Codacy Development / Codacy Static Code Analysis

hello.js#L5 

'query' is assigned a value but never used.

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Codacy Development / Codacy Static Code Analysis

hello.js#L5 

'query' is defined but never used.

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Codacy Development / Codacy Static Code Analysis

hello.js#L5 

Replace `·"SELECT·*·FROM·users·WHERE·username='"·+·username·+·"'·AND·password='"·+·password·+` with `⏎··"SELECT·*·FROM·users·WHERE·username='"·+⏎··username·+⏎··"'·AND·password='"·+⏎··password·+⏎·`

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hello.js#L5 

Unexpected var, use let or const instead.
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Codacy has a fix for the issue: Replace ·"SELECT·*·FROM·users·WHERE·username='"·+·username·+·"'·AND·password='"·+·password·+ with ⏎··"SELECT·*·FROM·users·WHERE·username='"·+⏎··username·+⏎··"'·AND·password='"·+⏎··password·+⏎·

Suggested change
var query = "SELECT * FROM users WHERE username='" + username + "' AND password='" + password + "'";
var query =

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❌ Codacy found a critical Error Prone issue: 'query' is assigned a value but never used.

The issue identified by ESLint is that the variable query is assigned a value but is not used anywhere within the code. This can lead to potential confusion and unnecessary memory usage. Additionally, the way the SQL query is constructed is highly vulnerable to SQL injection attacks due to the direct concatenation of user inputs.

To address the ESLint issue, you should either use the query variable or remove it if it's not needed. Assuming the query is supposed to be executed, you should pass it to an execution function.

Here's a single line change to fix the issue by passing the query to a hypothetical executeQuery function:

Suggested change
var query = "SELECT * FROM users WHERE username='" + username + "' AND password='" + password + "'";
executeQuery(query);

This change assumes that there is an executeQuery function defined elsewhere in your code that takes care of executing the SQL query.

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⚠️ Codacy found a medium Code Style issue: Unexpected var, use let or const instead.

The issue identified by the ESLint linter is that the var keyword is being used to declare the query variable. The var keyword is considered outdated and can lead to issues due to its function-scoped nature. Instead, let or const should be used to declare variables as they are block-scoped and provide better control over variable scope.

Here's the suggested change, using const since the query variable is not being reassigned:

Suggested change
var query = "SELECT * FROM users WHERE username='" + username + "' AND password='" + password + "'";
const query = "SELECT * FROM users WHERE username='" + username + "' AND password='" + password + "';";

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❌ Codacy found a critical Error Prone issue: 'query' is assigned a value but never used.

The issue here is that the query variable is being assigned a value but is not being used anywhere in the code. This is a potential bug because it suggests that the query is constructed but never executed or utilized, which might be an oversight.

Here's a single-line code suggestion to fix the issue by logging the constructed query to the console. This way, the query variable is used, and it also helps in debugging by showing what the final query looks like.

Suggested change
var query = "SELECT * FROM users WHERE username='" + username + "' AND password='" + password + "'";
console.log(query);

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Codacy has a fix for the issue: Replace ·"SELECT·*·FROM·users·WHERE·username='"·+·username·+·"'·AND·password='"·+·password·+ with ⏎··"SELECT·*·FROM·users·WHERE·username='"·+⏎··username·+⏎··"'·AND·password='"·+⏎··password·+⏎·

Suggested change
var query = "SELECT * FROM users WHERE username='" + username + "' AND password='" + password + "'";
var query =

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⚠️ Codacy found a medium Unused Code issue: 'query' is defined but never used.

The issue identified by the JSHint linter is that the variable query is declared and assigned a value, but it is not used anywhere in the code. This results in an "unused variable" warning. To fix this issue, you should ensure that the query variable is actually used in some meaningful way. For instance, if the intention is to execute this query, you should pass it to a function that performs the execution.

Here's a single line change to fix the issue by calling a hypothetical function executeQuery with the query variable:

Suggested change
var query = "SELECT * FROM users WHERE username='" + username + "' AND password='" + password + "'";
executeQuery(query);

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ℹ️ Codacy found a minor Code Style issue: 'query' is assigned a value but never used.

The issue identified by the ESLint linter is that the variable query is assigned a value but is not actually used in the code. This can indicate a potential bug or an incomplete implementation where the query should be executed but currently is not.

To fix this issue, you need to ensure that the query variable is used in a way that it executes the SQL statement. Assuming you have a function executeQuery that takes a SQL query string and executes it, you can use this function to fix the issue.

Here's the single line change to fix the issue:

Suggested change
var query = "SELECT * FROM users WHERE username='" + username + "' AND password='" + password + "'";
executeQuery(query);

So the complete code with the fix would look like:

var username = "admin";
var password = "' OR '1'='1";

var query = "SELECT * FROM users WHERE username='" + username + "' AND password='" + password + "'";
// Execute the query...
executeQuery(query);

Please note that this code is still vulnerable to SQL injection attacks. In a real-world scenario, you should use parameterized queries or prepared statements to prevent such vulnerabilities.

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// Execute the query...