Improper access control in Nextcloud Talk 6.0.3 leaks the existance and the name of private conversations when linked them to another shared item via the projects feature.
https://nextcloud.com/security/advisory/?id=NC-SA-2020-011
https://hackerone.com/reports/662218
Source: Mitre, NVD
Published: 2020-02-04
Updated: 2026-06-17
Base Score: 4
Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:N/A:N
Severity: Medium
Base Score: 2.7
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
Severity: Low
EPSS: 0.00178