In-Scope Vulnerabilities
You can report any vulnerabilities related to these issues:
- any balance manipulations (like having less than 0 on the balance, changing balance without depositing, using non-authorised assets);
- trading or purchasing tampering (swapping items, trading with no funds or negative balance, using non authorized assets, etc.);
- unauthorized access to servers (vulnerabilities that leads to RCE);
- changing item parameters on market or their prices (as well as other parameters and interruptions in Steam data communication);
- gaining access to other users’ accounts (and being able to affect it);
- XSS vulnerabilities (script execution needs to be proved);
- revealing confidential data (leaks, IDORs, etc.).
Out-of-Scope Vulnerabilities
However, there are some issues that can’t be included in our Bug Bounty program and therefore are not subject to a reward. Such as:
- reports generated and/or used with scanners and other automated tools;
- attacks that require gaining access to auser’s device;
- best practices in SSL/TLS configuration;
- spoofing content/inserting text (unless it can modify HTML/CSS or you show an attack vector);
- best practices in Content Security Policy, email (such as missing SPF/DKIM/DMARC records, etc.).
- Reports that state that software is out of date/vulnerable without a proof of concept