Mattermost 6.0 and earlier fails to sufficiently validate the email address during registration, which allows attackers to trick users into signing up using attacker-controlled email addresses via crafted invitation token.
The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.
Link | Tags |
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https://mattermost.com/security-updates/ | vendor advisory |
https://hackerone.com/reports/1357013 | permissions required |