Insufficient protection of the server-side encryption keys in Nextcloud Server 19.0.1 allowed an attacker to replace the public key to decrypt them later on.
https://nextcloud.com/security/advisory/?id=NC-SA-2020-040
https://hackerone.com/reports/743505
http://seclists.org/fulldisclosure/2020/Dec/54
Source: Mitre, NVD
Published: 2020-11-16
Updated: 2026-06-17
Base Score: 2.1
Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:P/A:N
Severity: Low
Base Score: 4.4
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Severity: Medium
EPSS: 0.00211