The Mozilla Observatory has helped over 170,000 websites by teaching developers, system administrators, and security professionals how to configure their sites safely and securely.

JSON web tokens are a type of access tokens that are widely used in commercial applications. They are based on the JSON format and includes a token signature to ensure the integrity of the token. Today, we are going to talk about the security implications of using JSON web tokens (and signature-based tokens in general), and how they can be exploited by attackers to bypass access control.

Regex is everywhere on the Internet nowadays. Downing Servers With Evil Regular Expressions. But can regex also lead to vulnerabilities? Today, let’s explore how attackers can exploit poorly…

As a company grows, it becomes increasingly difficult to secure the hundreds and thousands of machines on the network. Often, all an attacker needs to compromise a network is a single bug on a public-facing machine! Today, we will talk about a common vulnerability on the network perimeter…

31-days-of-API-Security-Tips

Effortlessly finding Cross Site Script Inclusion (XSSI) & JSONP for bug bounty

Attacks are the techniques that attackers use to exploit the vulnerabilities in applications. Attacks are often confused with vulnerabilities, so please try to be sure that the attack you are describing is something that an attacker would do, rather than a weakness in an application.

innerHTML is a JavaScript tag whos property is used for DOM manipulation. More specifically, it "sets or returns the HTML content (the inner HTML) of an element." Ordinarily, this property is used to examine the current HTML source of the page, including any changes that have been made since the page was initially loaded. But, it can also be used for Cross-site Scripting(XSS).

A JavaScript Polyglot is a Cross Site Scripting (XSS) vector that is executable within various injection contexts in its raw form, or a piece of code that can be executed in multiple contexts in the application. So, a JavaScript polyglot can be multiple things at once, like a JavaScript/JPEG

Cross-Site Request Forgery (CSRF) is an attack that forces an end user to execute unwanted actions on a web application in which they're currently authenticated. CSRF attacks specifically target state-changing requests, not theft of data, since the attacker has no way to see the response to the forged request.