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Security Bulletin: Vulnerability in IBM WebSphere eXtreme Scale Liberty Deployment could expose sensitive information.

Security Bulletin


Vulnerability in IBM WebSphere eXtreme Scale Liberty Deployment could expose sensitive information.

Vulnerability Details

CVEID:   CVE-2020-4336
DESCRIPTION:   IBM WebSphere Extreme Scale stores sensitive information in URL parameters. This may lead to information disclosure if unauthorized parties have access to the URLs via server logs, referrer header or browser history.
CVSS Base score: 3.7
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
WebSphere Extreme Scale8.6.1


For new installation, this vulnerability is fixed in 

ProductVRMFFix Remediation/First Fix
WebSphere eXtreme Scale8.6.1.4Fix Pack 4Recommended Fixes page for WebSphere eXtreme Scale.

For existing installation / upgrade please follow the steps in Workaround and mitigations section.

Workarounds and Mitigations

Add the following entry in RestAdmin server.xml located at <XSLD_HOME>\wlp\usr\servers\restAdminServer

and RestData server.xml located at <XSLD_HOME>\wlp\usr\servers\restDataServer 

<!-- Set the WASReqURL cookie to be secure -->
<webAppSecurity ssoRequiresSSL="true"/>
<httpSession cookieSecure="true"/>

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Change History

05 Jan 2021: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.


Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location


[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSTVLU","label":"WebSphere eXtreme Scale"},"Component":"","Platform":[{"code":"PF002","label":"AIX"},{"code":"PF010","label":"HP-UX"},{"code":"PF016","label":"Linux"},{"code":"PF027","label":"Solaris"},{"code":"PF033","label":"Windows"}],"Version":"8.6","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
05 January 2021