What is the CVSS score of CVE-2021-22895?

CVE-2021-22895 has a CVSS 3.1 base score of 5.9 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N. EPSS exploitation probability: 1.0%.

Is there a public PoC exploit available for CVE-2021-22895?

Yes, a public proof-of-concept exploit is available for CVE-2021-22895. Prioritise patching immediately. EPSS: 1.0%.

Is there a patch available for CVE-2021-22895?

Yes, a patch is available for CVE-2021-22895. Update the affected software to the latest version immediately.

Nextcloud CVE-2021-22895

MEDIUM

Improper Certificate Validation (CWE-295)

2021-06-11 support@hackerone.com

Nextcloud Information Disclosure Desktop Debian Linux

5.9

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.9 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Lifecycle Timeline

CVE Published

Jun 11, 2021 - 16:15 nvd

MEDIUM 5.9

DescriptionNVD

Nextcloud Desktop Client before 3.3.1 is vulnerable to improper certificate validation due to lack of SSL certificate verification when using the "Register with a Provider" flow.

AnalysisAI

Nextcloud Desktop Client before 3.3.1 is vulnerable to improper certificate validation due to lack of SSL certificate verification when using the "Register with a Provider" flow. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-295. Nextcloud Desktop Client before 3.3.1 is vulnerable to improper certificate validation due to lack of SSL certificate verification when using the "Register with a Provider" flow. Affected products include: Nextcloud Desktop, Debian Debian Linux. Version information: before 3.3.1.

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.