A bug in Nextcloud Server 15.0.2 causes pending 2FA logins to not be correctly expired when the password of the user is reset.
Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.
Link | Tags |
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https://hackerone.com/reports/486693 | third party advisory permissions required |
https://nextcloud.com/security/advisory/?id=NC-SA-2020-001 | vendor advisory |