CVE-2021-20424Network attack vector

Authenticated information disclosure via detailed browser errors

Published Jul 13, 2021 · Updated Sep 17, 2024

Information disclosure in IBM Cloud Pak for Applications 4.3 allows remote authenticated users to read sensitive data through browser errors. The browser-facing error handler returns detailed technical messages containing sensitive implementation information; IBM has not identified the affected endpoint or code path. Valid application credentials and a triggered error are required, and the disclosed details can support further attacks against the system.

CVSS severity4.3
Medium
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in IBM Cloud Pak for Applications 4.3 allows remote authenticated users to read sensitive data through browser errors. The browser-facing error handler returns detailed technical messages containing sensitive implementation information; IBM has not identified the affected endpoint or code path. Valid application credentials and a triggered error are required, and the disclosed details can support further attacks against the system.

The record

CVE
CVE-2021-20424
Published
Jul 13, 2021
Updated
Sep 17, 2024
Vendor
IBM
Product
IBM Cloud Pak for Applications
Classifications
CWE-209, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · IBM Cloud Pak for Applicationsversion=4.3

Published CVSS scores

3.8IBMCVSS:3.0/AC:L/I:N/A:N/PR:L/UI:N/AV:N/C:L/S:U/E:U/RC:C/RL:O
4.3IBMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

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-209Generation of Error Message Containing Sensitive Information
T1190Exploit Public-Facing Application

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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