6th October 2019
Risk level: Low
CVSS v3 Base Score: 2 (AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N)
CWE: Improper Authorization (CWE-285)
HackerOne report: 673724
Improper authorization in the Circles app 0.17.7 causes retaining access when an email address was removed from a circle.
The error has been fixed.
It is recommended that the Circles app is upgraded to 0.17.8.
The Nextcloud team thanks the following people for their research and responsible disclosure of the above advisory: