CVE-2023-39963

Nextcloud Server provides data storage for Nextcloud, an open source cloud
platform. Starting in version 20.0.0 and prior to versions 20.0.14.15,
21.0.9.13, 22.2.10.14, 23.0.12.8, 24.0.12.5, 25.0.9, 26.0.4, and 27.0.1, a
missing password confirmation allowed an attacker, after successfully stealing
a
session from a logged in user, to create app passwords for the victim.
Nextcloud
server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server
versions 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.9, 24.0.12.5, 25.0.9,
26.0.4, and 27.0.1 contain a patch for this issue. No known workarounds are
available.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-39963
https://www.cve.org/CVERecord?id=CVE-2023-39963
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j4qm-5q5x-54m5
https://github.com/nextcloud/server/pull/39416
https://hackerone.com/reports/2067572