CVE-2020-4304Network attack vector

Credential disclosure via Web UI script injection

Published Apr 2, 2020 · Updated Sep 17, 2024

Cross-site scripting in IBM WebSphere Application Server Liberty 17.0.0.3 through 20.0.0.3 allows remote attackers to inject JavaScript. The OAuth 2.0, OpenID Connect server and client, and SAML Web features place attacker-controlled content in the Web UI without neutralizing script; IBM has not disclosed the exact parameter or code locus. A victim must interact with the injected content in a trusted session, where the script can alter Web UI behavior and disclose credentials.

CVSS severity6.1
Medium
EPSS probability0.82%
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 WebSphere Application Server Liberty 17.0.0.3 through 20.0.0.3 allows remote attackers to inject JavaScript. The OAuth 2.0, OpenID Connect server and client, and SAML Web features place attacker-controlled content in the Web UI without neutralizing script; IBM has not disclosed the exact parameter or code locus. A victim must interact with the injected content in a trusted session, where the script can alter Web UI behavior and disclose credentials.

The record

CVE
CVE-2020-4304
Published
Apr 2, 2020
Updated
Sep 17, 2024
Vendor
IBM
Product
IBM WebSphere Application Server Liberty
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 2, 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

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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=17.0.0.3
  2. Affected versionversion=20.0.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM WebSphere Application Server Libertyversion=17.0.0.3; version=20.0.0.3

Published CVSS scores

6.1IBMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
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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