CVE-2021-41179
Nextcloud is an open-source, self-hosted productivity platform.
Does this matter?
Lower severity and a low EPSS score (1.20%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 1.20% probability · 66th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-304
- Affected
- nextcloud/server
- Source
- security-advisories@github.com
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7hvh-rc6f-px23Third Party Advisory
- https://github.com/nextcloud/server/pull/28725Patch, Third Party Advisory
- https://hackerone.com/reports/1322865Permissions Required
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7hvh-rc6f-px23Third Party Advisory
- https://github.com/nextcloud/server/pull/28725Patch, Third Party Advisory
- https://hackerone.com/reports/1322865Permissions Required
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.