What is the CVSS score of CVE-2020-6309?

CVE-2020-6309 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 1.8%.

Netweaver Application Server Java CVE-2020-6309

HIGH

Missing Authentication for Critical Function (CWE-306)

2020-08-12 cna@sap.com

Authentication Bypass Denial Of Service SAP Netweaver Application Server Java

7.5

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-306 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V6 - Authentication Authentication required for critical functions MITRE ATT&CK 1 technique across 1 tactic: Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived	A remote attacker could access critical functionality without authentication by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 1.8% exploitation probability (EPSS)

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AnalysisAI

SAP NetWeaver AS JAVA, versions - (ENGINEAPI 7.10; WSRM 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50; J2EE-FRMW 7.10, 7.11), does not perform any authentication checks for a web service allowing the. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

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.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified as Missing Authentication for Critical Function (CWE-306), which allows attackers to access critical functionality without authentication. SAP NetWeaver AS JAVA, versions - (ENGINEAPI 7.10; WSRM 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50; J2EE-FRMW 7.10, 7.11), does not perform any authentication checks for a web service allowing the attacker to send several payloads and leading to complete denial of service. Affected products include: Sap Netweaver Application Server Java.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.5 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

DescriptionNVD

SAP NetWeaver AS JAVA, versions - (ENGINEAPI 7.10; WSRM 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50; J2EE-FRMW 7.10, 7.11), does not perform any authentication checks for a web service allowing the attacker to send several payloads and leading to complete denial of service.

Threat Intelligence Overview

EPSS Score

1.8%

Top 24% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 1.8%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +2

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)NVD

cpe:2.3:a:sap:netweaver_application_server_java:7.10:*:*:*:*:*:*:*

cpe:2.3:a:sap:netweaver_application_server_java:7.11:*:*:*:*:*:*:*

cpe:2.3:a:sap:netweaver_application_server_java:7.20:*:*:*:*:*:*:*

cpe:2.3:a:sap:netweaver_application_server_java:7.30:*:*:*:*:*:*:*

cpe:2.3:a:sap:netweaver_application_server_java:7.31:*:*:*:*:*:*:*

cpe:2.3:a:sap:netweaver_application_server_java:7.40:*:*:*:*:*:*:*

cpe:2.3:a:sap:netweaver_application_server_java:7.50:*:*:*:*:*:*:*

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References

Advisories & patches

ADVISORY https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=552603345 REF https://launchpad.support.sap.com/#/notes/2941315

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GitHub PoC

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