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Security Bulletin: A vulnerability exists in the management GUI of the IBM FlashSystem 900

Security Bulletin


A vulnerability (CVE-2020-4987) affects the IBM FlashSystem model 900 management GUI.

Vulnerability Details

CVEID:   CVE-2020-4987
DESCRIPTION:   IBM FlashSystem 900 user management GUI is vulnerable to stored cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session.
CVSS Base score: 6.4
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N)

Affected Products and Versions

Storage Node machine type and models (MTMs) affected:

  • 9840-AE1 and 9843-AE1
  • 9840-AE2 and 9843-AE2
  • 9840-AE3 and 9843-AE3
Supported storage node code versions which are affected:
  • VRMFs and prior
  • VRMFs and prior
Note: For information on IBM FlashSystem V9000 SVC code levels affected and remediated, search for the equivalent security bulletin here: IBM Support


MTMsVRMFAPAR  Remediation/First Fix
FlashSystem 840 MTMs:

9840-AE1 and 9843-AE1

FlashSystem 900 MTMs:

9843-UF3, 9840-AE2, 9843-AE2, 9840-AE3, and 9843-AE3

Note: AE1 systems are no longer supported.

Code fixes are now available, the minimum VRMF containing the fix depending on the code stream: 

Fixed Code VRMF: 

1.6 stream:

1.5 stream:

N/A FlashSystem 900 fixes are available at IBM's Fix Central website. FlashSystem 840 is no longer supported.

Workarounds and Mitigations

Upgrade to a supported firmware level.

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The vulnerability was reported to IBM by Brice Augras, Antoine Enard, Victor Poucheret

Change History

03 May 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.


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. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

Document Location


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Document Information

Modified date:
12 May 2021