What is the CVSS score of CVE-2021-3339?

CVE-2021-3339 has a CVSS 3.1 base score of 4.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 1.9%.

Modernflow CVE-2021-3339

MEDIUM

Improper Authentication (CWE-287)

2021-02-19 cve@mitre.org

Authentication Bypass Modernflow

4.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

4.3 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

CVE Published

Feb 19, 2021 - 08:15 nvd

MEDIUM 4.3

DescriptionNVD

ModernFlow before 1.3.00.208 does not constrain web-page access to members of a security group, as demonstrated by the Search Screen and the Profile Screen.

AnalysisAI

ModernFlow before 1.3.00.208 does not constrain web-page access to members of a security group, as demonstrated by the Search Screen and the Profile Screen. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Improper Authentication (CWE-287), which allows attackers to bypass authentication mechanisms to gain unauthorized access. ModernFlow before 1.3.00.208 does not constrain web-page access to members of a security group, as demonstrated by the Search Screen and the Profile Screen. Affected products include: Microsoft Modernflow. Version information: before 1.3.00.208.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement multi-factor authentication, enforce strong password policies, use proven authentication frameworks.