Error Page Content Spoofing or Text Injection

Description: -------------- Content spoofing, also referred to as content injection, "arbitrary text injection" or virtual defacement, is an attack targeting a user made possible by an injection vulnerability in a web application. When an application does not properly handle user-supplied data, an attacker can supply content to a web application, typically via a parameter value, that is reflected back to the user. This presents the user with a modified page under the context of the trusted domain. Steps to Reproduce: --------------------- 1. Login with valid credentials. 2. On the application Dashboard, I have searched the malicious query and it will result in the error or data not found. I have leveraged this issue to content spoofing or Text injection attack. For the Reference --------------------- 1) https://hackerone.com/reports/327671 2) https://hackerone.com/reports/106350 ## Impact This attack is typically used as, or in conjunction with, social engineering because the attack is exploiting a code-based vulnerability and a user's trust. As a side note, this attack is widely misunderstood as a kind of bug that brings no impact.