CVE-2020-4909Network attack vector

Credential disclosure via Web UI script injection

Published Jan 4, 2021 · Updated Sep 16, 2024

Cross-site scripting in IBM Cloud Pak System 2.3 allows remote authenticated users to expose credentials through the Web UI. IBM has not published the affected Web UI field or handler, but states that it accepts embedded arbitrary JavaScript. Exploitation requires high privileges and another user's interaction in a trusted session; documented effects are credential disclosure and UI alteration.

CVSS severity4.8
Medium
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in IBM Cloud Pak System 2.3 allows remote authenticated users to expose credentials through the Web UI. IBM has not published the affected Web UI field or handler, but states that it accepts embedded arbitrary JavaScript. Exploitation requires high privileges and another user's interaction in a trusted session; documented effects are credential disclosure and UI alteration.

The record

CVE
CVE-2020-4909
Published
Jan 4, 2021
Updated
Sep 16, 2024
Vendor
IBM
Product
Cloud Pak System
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 4, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · Cloud Pak Systemversion=2.3

Published CVSS scores

4.8NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
3.5NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
4.8IBMCVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.6IBMCVSS:3.0/AV:N/A:N/S:C/C:L/UI:R/AC:L/PR:H/I:L/E:H/RL:O/RC:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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