Web Security Academy - Stored XSS into HTML context with nothing encoded [Solution]

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XML External Entity (XXE) Injection

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In this section, we’ll explain what XML external entity injection is, describe some common examples, explain how to find and exploit various kinds of XXE injection, and summarize how to prevent XXE injection attacks. What is XML external entity injection? XML external entity injection (also known as XXE) is a web security vulnerability that allows an attacker to interfere with an application’s processing of XML data. It often allows an attacker to view files on the application server filesystem, and to interact with any backend or external systems that the application itself can access. In some situations, an attacker can escalate an XXE attack to compromise the underlying server or other backend infrastructure, by leveraging the XXE vulnerability to perform server-side request forgery (SSRF) attacks. There are various types of XXE attacks: XXE Attack TypeDescriptionExploiting XXE to Retrieve FilesWhere an external entity is defined containing the contents of a file,...
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SQL Injection Payload List

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In this section, we’ll explain what SQL injection is, describe some common examples, explain how to find and exploit various kinds of SQL injection vulnerabilities, and summarize how to prevent SQL injection. What is SQL injection (SQLi)? SQL injection is a web security vulnerability that allows an attacker to interfere with the queries that an application makes to its database. It generally allows an attacker to view data that they are not normally able to retrieve. This might include data belonging to other users, or any other data that the application itself is able to access. In many cases, an attacker can modify or delete this data, causing persistent changes to the application’s content or behavior. In some situations, an attacker can escalate an SQL injection attack to compromise the underlying server or other back-end infrastructure, or perform a denial-of-service attack. SQL Injection Type : In-band SQLi (Classic SQLi) :  In-band SQL Injection is the most co...
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