![]() Many users may not even be aware that such a feature exists. It is still easy enough to sign-in to sites and services using Bitwarden, even if auto-fill is not enabled. There is a reason why it is disabled, and while attacks are not very likely, it is still a risk that users need to consider. Most Bitwarden users may want to keep the feature turned off. Includes options to enable it for select sites only. Do not auto-fill on page load - disables the auto-fill feature by default.An option to disable it on certain sites is provided. Auto-fill on page load - uses the auto-fill feature on all sites automatically.The preferences may be edited once the feature is enabled. Warning: Compromised or untrusted websites can exploit auto-fill on page load". Checking "Auto-fill on page load" enables the feature in the browser.īitwarden displays a warning under the setting: "If a login form is detected, auto-fill when the web page loads. This is done by selecting Settings in the Bitwarden extension and then the Auto-Fill option. It is disabled by default and needs to be turned on by the user explicitly. The on page load auto-fill feature is available in Bitwarden's browser extensions. Tip: did you know that you may use Bitwarden on the Go? Bitwarden auto-fill on page load The researchers discovered that Bitwarden's auto-fill feature would also fill out logins on subdomains. The company explained back then that attackers could forward login information entered into the embedded iframe to remote servers without further user interaction. The attack has several ifs attached to it: Bitwarden users need to enable auto-login first and foremost in the settings, and then they need to visit a site with an embedded malicious iframe and have a login for the site in question.įlashpoint researchers discovered that Bitwarden's auto-fill functionality fills out forms in embedded iframes, even if these come from external domains. Threat actors could exploit Bitwarden's autofill feature by planting malicious iframes into trusted websites to steal credentials. Additionally, basic authentication prompts work a little differently than regular auto-fills. ![]() An attacker would have to inject a malicious iframe into a legitimate website to take advantage of this.īleeping Computer discovered that the issue has been reported to Bitwarden in 2018 by Flashpoint. Password Manager Auto-fill Auto-fill Logins in Browser Extensions tip If your browser extension is having issues auto-filling usernames and passwords for a particular site, using linked custom fields can force an auto-fill. It is the use of iframes that could be exploited under certain conditions. Apple does so on its icloud website, by loading an iframe from its main website. Some companies and services use iframes for logins. An iframe loads another HMTL page within the current document. When youre happy with the info you entered you can press the blue save button at the bottom to save the item to your encrypted vault. Some websites use iframes for login forms. Update: Bitwarden has created a fix for the issue. While it offers benefits, especially when it comes to convenience, it is also introducing an issue that could be exploited under certain circumstances. This convenience feature is safe to use on most websites and it speeds up the login process for Bitwarden users.
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