published June 19, 2020
🚨 A password reset request could be sent to an attacker's email instead of the user’s! That's a recipe for disaster in Mattermost Server versions before 4.0.0! 🔥 Think of it like a restaurant accidentally sending a takeout order to the wrong customer — without double-checking the name on the order, anyone could snatch a meal meant for someone else! This oversight could potentially allow an attacker to take control of user accounts by intercepting password reset emails. If an attacker successfully resets a password, they could gain unauthorized access to sensitive conversations and files, putting your team's data at risk.
Think of it like a restaurant accidentally sending a takeout order to the wrong customer — without double-checking the name on the order, anyone could snatch a meal meant for someone else! The vulnerability occurs when the password reset request is made without proper validation of the email address, allowing attackers to specify an email address of their choice.
This oversight could potentially allow an attacker to take control of user accounts by intercepting password reset emails. If an attacker successfully resets a password, they could gain unauthorized access to sensitive conversations and files, putting your team's data at risk. Upgrade Mattermost Server to version 4.0.0, 3.10.2, or 3.9.2. Additionally, implement strict email validation to ensure that password reset requests can only be sent to registered email addresses. This is a fixable issue! Patching now will help you maintain security and keep your team’s data safe! 🛡️