CVE-2020-4336Network attack vector

Sensitive-data disclosure via URL parameter storage

Published Jan 6, 2021 · Updated Sep 16, 2024

Information disclosure in IBM WebSphere eXtreme Scale 8.6.1 allows remote attackers to expose sensitive data through URL parameters. Sensitive values are placed in URLs, causing them to persist in server logs, browser history, or referrer headers rather than remaining confined. Exposure requires access to one of those URL-bearing artifacts; the reported consequence is reading the embedded data without data modification or service interruption.

CVSS severity3.7
Low
EPSS probability0.97%
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 eXtreme Scale 8.6.1 allows remote attackers to expose sensitive data through URL parameters. Sensitive values are placed in URLs, causing them to persist in server logs, browser history, or referrer headers rather than remaining confined. Exposure requires access to one of those URL-bearing artifacts; the reported consequence is reading the embedded data without data modification or service interruption.

The record

CVE
CVE-2020-4336
Published
Jan 6, 2021
Updated
Sep 16, 2024
Vendor
OpenBMC Project
Product
IBM WebSphere eXtreme Scale
Classifications
CWE-200
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 6, 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=8.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenBMC Project · IBM WebSphere eXtreme Scaleversion=8.6.1

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
3.7IBM CorporationCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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