CVE-2021-41179CWE-304

Two-Factor Authentication not enforced for pages marked as public

Medium · published October 25, 2021

CVSS v3.1
6.5
EPSS
1%
Percentile
67.8
In the wild
Unconfirmed
What it is

Nextcloud is an open-source, self-hosted productivity platform. Prior to Nextcloud Server versions 20.0.13, 21.0.5, and 22.2.0, the Two-Factor Authentication wasn't enforced for pages marked as public. Any page marked as `@PublicPage` could thus be accessed with a valid user session that isn't authenticated. This particularly affects the Nextcloud Talk application, as this could be leveraged to gain access to any private chat channel without going through the Two-Factor flow. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5 or 22.2.0. There are no known workarounds aside from upgrading.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.01195 · 67.8th percentile
Weakness
CWE-304 · Missing Critical Step in Authentication
Published
2021-10-25T22:00Z
EPSS history
Timeline
  • 25 OCT 22:00Z
    Two-Factor Authentication not enforced for pages marked as public
    cvelistv5