CS2 XSS Security Issue: Facts and Safety Guide

The CS2 XSS security problem affected many players in late 2023. Players found a way to see other players' IP addresses on game servers.

Some players also showed unwanted content in the game's vote section by using special URLs in their nicknames.

The Problem and Valve's Response

Players could add HTML content into the game through their nicknames. This created security risks for other players.

The issue let attackers see IP addresses of players on their team during vote kicks.

Valve fixed the problem with a 7MB update. The fix blocked HTML in player names and turned any links into plain text.

This stopped the security problem from working.

New Security Concerns

A new issue exists with workshop maps. These maps can make game menu panels and do automatic actions like:

1. Delete items from inventory
2. Apply stickers to weapons
3. Change menu settings

How to Stay Safe When Playing CS2

1. Update your game to the latest version
2. Use two-factor authentication on Steam
3. Download workshop maps only from trusted creators
4. Keep your Steam password strong and unique
5. Avoid trade offers from strangers

Your Role

Report any odd behavior you see in the game. This helps Valve fix problems faster.

The security of your account depends on both Valve's fixes and your careful actions.

Current Status

The original XSS problem no longer exists. Valve fixed it quickly after finding out.

But players should stay alert about workshop map downloads and friend requests from unknown players.