What is the CVSS score of CVE-2021-22877?

CVE-2021-22877 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N. EPSS exploitation probability: 1.7%.

Is there a public PoC exploit available for CVE-2021-22877?

Yes, a public proof-of-concept exploit is available for CVE-2021-22877. Prioritise patching immediately. EPSS: 1.7%.

Is there a patch available for CVE-2021-22877?

Yes, a patch is available for CVE-2021-22877. Update the affected software to the latest version immediately.

Fedora CVE-2021-22877

MEDIUM

Improper Access Control (CWE-284)

2021-03-03 support@hackerone.com

Authentication Bypass Fedora Nextcloud Server Nextcloud Fedoraproject

6.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.5 MEDIUM

AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

CVE Published

Mar 03, 2021 - 18:15 nvd

MEDIUM 6.5

DescriptionNVD

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.

AnalysisAI

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. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-284. 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. Affected products include: Nextcloud Nextcloud Server, Fedoraproject Fedora. Version information: prior to 20.0.6.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.