What is the CVSS score of CVE-2021-27963?

CVE-2021-27963 has a CVSS 3.1 base score of 8.2 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N. EPSS exploitation probability: 2.4%.

Is there a public PoC exploit available for CVE-2021-27963?

Yes, a public proof-of-concept exploit is available for CVE-2021-27963. Prioritise patching immediately. EPSS: 2.4%.

Sonlogger CVE-2021-27963

HIGH

Missing Authentication for Critical Function (CWE-306)

2021-03-05 cve@mitre.org

Authentication Bypass Sonlogger

8.2

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.2 HIGH

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

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:L/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

None

Lifecycle Timeline

CVE Published

Mar 05, 2021 - 02:15 nvd

HIGH 8.2

DescriptionNVD

SonLogger before 6.4.1 is affected by user creation with any user permissions profile (e.g., SuperAdmin). An anonymous user can send a POST request to /User/saveUser without any authentication or session header.

AnalysisAI

SonLogger before 6.4.1 is affected by user creation with any user permissions profile (e.g., SuperAdmin). Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Missing Authentication for Critical Function (CWE-306), which allows attackers to access critical functionality without authentication. SonLogger before 6.4.1 is affected by user creation with any user permissions profile (e.g., SuperAdmin). An anonymous user can send a POST request to /User/saveUser without any authentication or session header. Affected products include: Sfcyazilim Sonlogger. Version information: before 6.4.1.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Require authentication for all sensitive operations, implement defense in depth.