What is the CVSS score of CVE-2021-22879?

CVE-2021-22879 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 4.7%.

Is there a public PoC exploit available for CVE-2021-22879?

Yes, a public proof-of-concept exploit is available for CVE-2021-22879. Prioritise patching immediately. EPSS: 4.7%.

Is there a patch available for CVE-2021-22879?

Yes, a patch is available for CVE-2021-22879. Update the affected software to the latest version immediately.

Nextcloud CVE-2021-22879

HIGH

Improper Control of Resource Identifiers ('Resource Injection') (CWE-99)

2021-04-14 support@hackerone.com

Nextcloud Code Injection Desktop Fedora

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Apr 14, 2021 - 13:15 nvd

HIGH 8.8

DescriptionNVD

Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. User interaction is needed for exploitation.

AnalysisAI

Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-99. Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. User interaction is needed for exploitation. Affected products include: Nextcloud Desktop, Fedoraproject Fedora. Version information: prior to 3.1.3.

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.