Cyber Risks · PortSwigger Research

Server-side Java Script code injection

Summary: Server-side code injection occurs when an application places user-controllable data into a string that a code interpreter evaluates dynamically, letting an attacker who supplies unvalidated input alter the code and run arbitrary code on the server. PortSwigger rates these vulnerabilities as usually very serious, leading to complete compromise of the application's data and functionality and often of the hosting server, which may then serve as a platform for further attacks.

Why it matters: The consequence named here is complete compromise of application data and functionality, and often of the server itself - and that server can then be used to attack other systems.

Read the original at PortSwigger Research ↗

Topics
Supply Chain & AppSec
Related
Kitesurf is now open source Cyber Risks · Nov 13, 2026