The writer discusses a type of bug that, while not serious, can have serious consequences depending on the nature of the company it affects.
This bug allows for cross-site scripting (XSS) attacks, which the writer demonstrates by uploading a vulnerable PDF file that runs JavaScript code when the file is opened.
The writer demonstrates how this bug can be used to hijack employee computers, and shows how this bug can be used to affect a company’s domain.
The writer provides a link to a repository where other vulnerable PDFs can be found, and explains that using this bug one can sometimes gain access to a company’s internal systems.
The writer describes two real-life cases in which this bug led to a high bug bounty reward, and explains how they exploited the bug in each case.
The writer provides a summary of the most important points, again emphasizing that this bug can be critical depending on the context and how it is exploited.