User Credentials Exposure in Nextcloud by Inadequate Access Control
CVE-2021-22877

6.5MEDIUM

Key Information:

Vendor

Nextcloud
Status
Nextcloud Server
Vendor
CVE Published:
3 March 2021

What is CVE-2021-22877?

An inadequate user verification mechanism in Nextcloud versions prior to 20.0.6 can unintentionally assign a user's credentials to the configuration of external storage for other users. This issue arises when a user attempts to set up external storage but lacks pre-configured settings, resulting in unauthorized access to sensitive data. It is crucial for administrators to update their Nextcloud installations to mitigate this security risk.

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Affected Version(s)

Nextcloud Server Fixed in 20.0.6

References

https://hackerone.com/reports/1061591
x_refsource_MISC
https://nextcloud.com/security/advisory/?id=NC-SA-2021-004
x_refsource_MISC
https://github.com/nextcloud/server/issues/24600
x_refsource_MISC

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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