5 Lines of Code That Can BREAK Your Website!

Summary: The video discusses a recent security vulnerability found in Next.js, where certain X middleware headers can bypass internal routing, potentially compromising authorization and authentication processes. Bug bounty hunters reported that introducing multiple entries could lead to unauthorized access, raising concerns among developers about the security of their applications.

Keypoints:

• A vulnerability was discovered in Next.js related to X middleware headers.
• Using five entries in the X middleware header can bypass internal routing and authentication checks.
• The hardcoded depth check prevents infinite loop recursion, hence the significance of the number five.
• Developers are scrambling to assess their applications’ vulnerability to this issue.
• The discussion expands on ideas from the YouTube channel Security Weekly – A CRA Resource.