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Security Bulletin: IBM API Connect V5 Developer Portal is vulnerable to cross-site scripting (CVE-2020-4838)

Security Bulletin


IBM API Connect has addressed the following vulnerability

Vulnerability Details

CVEID:   CVE-2020-4838
DESCRIPTION:   IBM API Connect 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

Affected Product(s)Version(s)
API ConnectIBM API Connect V5.0.0.0-


Affected Product

Addressed in VRMF
Remediation / First Fix

IBM API Connect

V5.0.0.0- iFix (Developer Portal) released on

December 18th, 2020 or later.

LI81918 Addressed in IBM API Connect V5.0.8.10 iFix (Developer Portal) 

released on December 18, 2020 or later

Developer Portal is impacted.

Follow this link and find the "Portal" package:


Workarounds and Mitigations


Get Notified about Future Security Bulletins




This vulnerability was reported to IBM by Tomáš Melicher from Citadelo.

Change History

2021 January 11: 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":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSMNED","label":"IBM API Connect"},"Component":"","Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"v5.0.0.0-v5.0.8.10","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
13 January 2021