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Security Bulletin: Overly Permissive CORS Policy vulnerability found on IBM Security Secret Server (CVE-2019-4633)

Security Bulletin


This security bulletin describes plugging some potential, minor yet significant, information leaks by the IBM Security Secret Server. IBM Security Secret Server has an overly permissive CORS policy for login.

Vulnerability Details

CVEID:   CVE-2019-4633
DESCRIPTION:   IBM Security Secret Server could allow an attacker to obtain sensitive information due to an overly permissive CORS policy.
CVSS Base score: 3.1
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
IBM Security Secret ServerAll


1) At the SecretServer installation folder, in the web-appsettings.config file under appSettings add:
        <add key="UseWebConfigCORS" value="true"></add>


2) At the SecretServer installation folder, in the web.config file under system.webServer/httpProtocol/customHeaders add:


        <add name="Access-Control-Allow-Origin" value="[customer URL here]" />
        <add name="Access-Control-Allow-Headers" value="Content-Type" />
        <add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE, OPTIONS" />

Workarounds and Mitigations


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Change History

03 Jan 2020: 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":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSWHLP","label":"IBM Security Secret Server"},"Component":"","Platform":[{"code":"PF033","label":"Windows"}],"Version":"All","Edition":"","Line of Business":{"code":"LOB24","label":"Security Software"}}]

Document Information

Modified date:
24 January 2020