@Phish no, its a self-hosted copy of the software we operate as SaaS on GitLab.com
GitLab.com runs the same codebase as the self-hosted GitLab product. The sign-in page for GitLab.com and self-hosted GitLab look the same because it’s the same source code behind the HTML rendered in the browser.
With self-hosted web applications, the URL is the source of truth on what credentials are appropriate to use. Using GitLab.com credentials on a self-hosted GitLab has the same functionality as using Gmail credentials on a self-hosted GitLab - it doesn’t work (assuming you don’t reuse username/password across sites).
For a self-hosted GitLab sign-in page to be used for phishing, it would have to capture credentials in a way that they can be captured and transmitted in plaintext. This functionality is not part of GitLab’s codebase, credentials are not captured and transmitted in plaintext upon sign-in. For a phishing attack to be successful, someone would have to spoof a GitLab sign-in page with an embedded keylogger, serve it up at URL other than https://gitlab.com, and have the victim overlook the discrepancy in URL.
It’s similar to how WordPress.com has a sign-in page that looks like the sign-in page on as a self-hosted WordPress installation. There’s no benefit or reason to enter and submit account credentials for
mywordpress.gregsblog.com/log-in, even though the login pages may look the same in the browser. If you do make a mistake and enter the credentials into the self-hosted WordPress, your username/password won’t be stored and transmitted to a hacker, the credentials simply just don’t work.
To prevent risk of phishing for GitLab or any important account, I strongly suggest you: