HexBrain

Valve · Report #2270633

Web API key registration allows registering multiple keys by reusing `request_id`

Validstatus
lowseverity
40upvotes
12 Dec 2023disclosed

Summary

The Steam API key registration now requires a confirmation via the mobile authenticator. The request_id, once correctly confirmed, was not correctly updated and could be used more than once to register keys for the given account.

The registration process is now fixed, and accounts with multiple registered keys have been corrected.

How it was found

The write-up for this report has not been downloaded yet, or the program disclosed it without one. Read it on HackerOne.

This report was disclosed publicly on HackerOne and belongs to its author and the program. See the original