What is the CVSS score of CVE-2015-1920?

CVE-2015-1920 has a CVSS 2.0 base score of 10.0 (Critical). CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. EPSS exploitation probability: 18.4%.

Is there a patch available for CVE-2015-1920?

Yes, a patch is available for CVE-2015-1920. Update the affected software to the latest version immediately.

Websphere Application Server CVE-2015-1920

CRITICAL

Improper Access Control (CWE-284)

2015-05-20 psirt@us.ibm.com

Authentication Bypass RCE IBM Websphere Application Server

10.0

CVSS 2.0 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-284 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V8 - Authorization Access control enforcement MITRE ATT&CK 1 technique across 1 tactic: Defense Evasion 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 10.0 (CRITICAL). Attack characteristics: network attack vector, low complexity. EPSS exploitation probability: 18.39%.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

Patch available 18.4% exploitation probability (EPSS)

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AnalysisAI

IBM WebSphere Application Server (WAS) 6.1 through 6.1.0.47, 7.0 before 7.0.0.39, 8.0 before 8.0.0.11, and 8.5 before 8.5.5.6 allows remote attackers to execute arbitrary code by sending crafted. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, low attack complexity. Epss exploitation probability 18.4%.

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.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-284. IBM WebSphere Application Server (WAS) 6.1 through 6.1.0.47, 7.0 before 7.0.0.39, 8.0 before 8.0.0.11, and 8.5 before 8.5.5.6 allows remote attackers to execute arbitrary code by sending crafted instructions in a management-port session. Affected products include: Ibm Websphere Application Server. Version information: through 6.1.0.47.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 10.0 CRITICAL

AV:N/AC:L/Au:N/C:C/I:C/A:C

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Confidentiality

Integrity

Availability

DescriptionCVE.org

Threat Intelligence Overview

EPSS Score

18.4%

Top 5% exploitable

Data Quality

3 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 CRITICAL

CISA KEV No

Public POC No

EPSS 18.4%

Patch available Yes

Active threat No

Deciding rule

CRITICAL severity

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

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +18

CVSS: +50

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.

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)CVE.org

cpe:2.3:a:ibm:websphere_application_server:6.1:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.0:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.1:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.2:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.3:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.5:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.7:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.9:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.11:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.12:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.13:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.14:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.15:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.17:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.19:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.21:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.23:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.25:*:*:*:*:*:*:*

cpe:2.3:a:ibm:websphere_application_server:6.1.0.27:*:*:*:*:*:*:*

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References

Advisories & patches

PATCH http://www-01.ibm.com/support/docview.wss?uid=swg21883573 REF http://www-01.ibm.com/support/docview.wss?uid=swg1PI38302 REF http://www.securityfocus.com/bid/74439 REF http://www.securitytracker.com/id/1032249

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