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Dec 15, 2021 · Common JavaScript security vulnerabilities. Security best practices. Use a JavaScript linter. Audit dependencies using a package manager. Add Subresource Integrity (SRI) checking to external scripts. Avoid using inline JavaScript. Validate user input. Escape or encode user input. Use a CSRF token that’s not stored in cookies.
- Avoid Eval() The function in JavaScript is used to evaluate a string as JavaScript code and execute it. While this function can be convenient for some dynamic programming tasks, it poses a significant security risk when misused.
- Validate and Sanitize Input. Always validate and sanitize user input to prevent cross-site scripting (XSS) and other injection attacks. Example: // the input string const userInput = ""; // sanatize the input string before use const sanitizedInput = userInput.replace(/.*?
- Use Content Security Policy (CSP) CSP helps prevent XSS attacks by controlling which resources can be loaded. Example: Content-Security-Policy: default-src 'self';
- Avoid Inline Event Handlers. Inline event handlers can be a vector for XSS attacks. Example: Avoid this: Instead, use
- Validation and Sanitization of Inputs. Validating and sanitizing user inputs constitutes a pivotal step in securing your JavaScript applications. By implementing robust input validation, you can effectively preempt common vulnerabilities like Cross-Site Scripting (XSS) attacks.
- Steering Clear of Eval() Utilizing the eval() function has emerged as a significant security hazard, given its potential to execute arbitrary code, thereby enabling code injection vulnerabilities.
- Preventing Cross-Site Scripting (XSS) Cross-Site Scripting (XSS) incidents occur when untrusted data is rendered in browsers without adequate escape measures.
- Safeguarding Against Cross-Site Request Forgery (CSRF) To avert CSRF attacks, your JavaScript applications must integrate robust CSRF protection mechanisms.
Mar 11, 2023 · Best Practices for JavaScript Security. Here are some best practices for keeping your JavaScript code secure: Validate user input - Ensure that user input is validated on both the client and server sides to prevent attacks such as SQL injection. Sanitize data - Remove potentially harmful code or characters from user input to prevent XSS attacks.
- Source Code Vulnerabilities. Frequently, source code vulnerabilities may be combined with other—even a number of—JavaScript security holes. Unfortunately in such cases, using a single JavaScript obfuscation cannot prevent or hide these types of vulnerabilities.
- Unintended Script Execution. The majority of unintended script execution attacks involve cross-site scripting (XSS). A particular concern related to JavaScript is the way it interacts with the Document Object Model (DOM) on a web page, allowing scripts to be embedded and executed on client computers across the web.
- Escaping/Encoding User Input. XSS attacks rely on supplying data that contains certain special characters that are used in the underlying HTML, JavaScript, or CSS of a web page.
- Filtering Input. In some cases, it might be preferable to simply remove dangerous characters from the data received as input. This can provide some degree of protection but should not be relied on alone for protection from data manipulation.
Aug 14, 2024 · 1. Avoid Using eval() The eval() function can execute a string of code within the local scope, but it poses significant security risks. It allows an attacker to inject malicious code, leading to ...
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Jul 31, 2024 · 5. Regular Security Audits. Conducting regular security audits is crucial for identifying potential vulnerabilities in your JavaScript applications. This extends to digital asset management systems, where regular audits ensure that assets are properly secured and managed, reducing the risk of unauthorized access.
