CVE-2021-22877

Public Exploit

Description

A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own credentials for other users external storage configuration when not already configured yet.

Categories

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.46%
Vendor Advisory fedoraproject.org Vendor Advisory nextcloud.com
Affected: n/a Nextcloud Server
Published at:
Updated at:

References

Link Tags
https://hackerone.com/reports/1061591 issue tracking third party advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2021-004 broken link vendor advisory
https://github.com/nextcloud/server/issues/24600 issue tracking patch exploit third party advisory
https://github.com/nextcloud/server/pull/25224 third party advisory patch
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-22877?
CVE-2021-22877 has been scored as a medium severity vulnerability.
How to fix CVE-2021-22877?
To fix CVE-2021-22877, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-22877 being actively exploited in the wild?
It is possible that CVE-2021-22877 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-22877?
CVE-2021-22877 affects n/a Nextcloud Server.
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