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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.


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

Document Location


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Document Information

Modified date:
12 May 2021