CVE-2020-4421

mediumpriority · track · 22EPSS 0.006 · 50 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.62% (50th) EPSS

CVSS 5.5 · medium

Is it mine?

3 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

IBM WebSphere Application Liberty 19.0.0.5 through 20.0.0.4 could allow an authenticated user using openidconnect to spoof another users identify. IBM X-Force ID: 180084.

cvss

Technical severity, 0–10. One row per scoring source.

5.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:Nprimary · NVD / NIST USexploitability 8 · impact 4.9

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 2.5

v3.05mediumCVSS:3.0/A:L/I:L/AV:N/AC:H/S:U/C:L/PR:L/UI:N/RL:O/E:U/RC:Csecondary · ENISA EU

v3.05mediumCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:Lsecondary · psirt@us.ibm.com USexploitability 1.6 · impact 3.4

v3.15mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-290USprimary

affected products (3)

Products and version ranges known to be affected.

IBM WebSphere Application Server Liberty≤ 19.0.0.5enisa_euvdEU
IBM WebSphere Application Server Liberty≤ 20.0.0.4enisa_euvdEU
ibm websphere application server19.0.0.5 → 20.0.0.5nvdUScpe:2.3:a:ibm:websphere_application_server:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2020-05-06modified 2026-06-17

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references (25)

External citations — patches, advisories, analysis.

scry

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