CVE-2020-4329Network attack vector

Authenticated information disclosure via improper parameter checking

Published Apr 28, 2020 · Updated Sep 17, 2024

Information disclosure in IBM WebSphere Application Server and Liberty allows remote authenticated users to read sensitive data over the network. IBM identifies the administrative console as the affected component and states that improper parameter checking permits spoofing, but it has not disclosed the parameter, request path, or data exposed. Successful exploitation requires valid remote credentials; reported impact is limited to sensitive-information disclosure, with no integrity or availability impact.

CVSS severity4.3
Medium
EPSS probability1.12%
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 WebSphere Application Server and Liberty allows remote authenticated users to read sensitive data over the network. IBM identifies the administrative console as the affected component and states that improper parameter checking permits spoofing, but it has not disclosed the parameter, request path, or data exposed. Successful exploitation requires valid remote credentials; reported impact is limited to sensitive-information disclosure, with no integrity or availability impact.

The record

CVE
CVE-2020-4329
Published
Apr 28, 2020
Updated
Sep 17, 2024
Vendor
IBM
Product
IBM WebSphere Application Server
Classifications
Unavailable
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 28, 2020CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=7.0
  2. Affected versionversion=8.0
  3. Affected versionversion=8.5
  4. Affected versionversion=9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · IBM WebSphere Application Serverversion=7.0; version=8.0; version=8.5; version=9.0
IBM · IBM WebSphere Application Server Libertyversion=17.0.0.3; version=20.0.0.4

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.3IBM CorporationCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:P/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

No sourced classifications are available.

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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