Missing state in Nextcloud Server prior to 14.0.0 would not enforce the use of a second factor at login if the the provider of the second factor failed to load.
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
Link | Tags |
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https://hackerone.com/reports/317711 | third party advisory |
https://nextcloud.com/security/advisory/?id=NC-SA-2018-011 | vendor advisory |