IBM Support

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


Get Notified about Future Security Bulletins



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.


According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Document Location


[{"Business Unit":{"code":"BU008","label":"Security"},"Product":{"code":"SSWHLP","label":"IBM Security Secret Server"},"Component":"","Platform":[{"code":"PF033","label":"Windows"}],"Version":"All","Edition":""}]

Document Information

Modified date:
24 January 2020