What is the CVSS score of CVE-2021-31703?

CVE-2021-31703 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 1.2%.

Ichris CVE-2021-31703

CRITICAL

Unrestricted Upload of File with Dangerous Type (CWE-434)

2021-05-29 cve@mitre.org

File Upload Ichris

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

May 29, 2021 - 14:15 nvd

CRITICAL 9.8

DescriptionNVD

Frontier ichris through 5.18 allows users to upload malicious executable files that might later be downloaded and run by any client user.

AnalysisAI

Frontier ichris through 5.18 allows users to upload malicious executable files that might later be downloaded and run by any client user. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Unrestricted File Upload (CWE-434), which allows attackers to upload malicious files that can be executed on the server. Frontier ichris through 5.18 allows users to upload malicious executable files that might later be downloaded and run by any client user. Affected products include: Frontiersoftware Ichris. Version information: through 5.18.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate file types server-side, store uploads outside webroot, use random filenames, scan for malware.