CVE-2021-20354

highpriority · track · 31EPSS 0.041 · 91 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

4.10% (91st) EPSS

CVSS 7.8 · high

Is it mine?

6 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

IBM WebSphere Application Server 8.0, 8.5, and 9.0 could allow a remote attacker to traverse directories. An attacker could send a specially-crafted URL request containing "dot dot" sequences (/../) to view arbitrary files on the system. IBM X-Force ID: 194883.

cvss

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

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.9–7.8

v2.07.8highAV:N/AC:L/Au:N/C:C/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 6.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.05.9mediumCVSS:3.0/I:N/UI:N/A:N/AV:N/PR:N/AC:H/S:U/C:H/RL:O/RC:C/E:Usecondary · ENISA EU

v3.05.9mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · psirt@us.ibm.com USexploitability 2.2 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22USprimary

affected products (6)

Products and version ranges known to be affected.

IBM WebSphere Application Server≤ 9.0enisa_euvdEU
IBM WebSphere Application Server≤ 8.5enisa_euvdEU
IBM WebSphere Application Server≤ 8.0enisa_euvdEU
ibm websphere application server8.0.0.0 → 8.0.0.15nvdUScpe:2.3:a:ibm:websphere_application_server:*:*:*:*:*:*:*:*
ibm websphere application server8.5.0.0 → 8.5.5.19nvdUScpe:2.3:a:ibm:websphere_application_server:*:*:*:*:*:*:*:*
ibm websphere application server9.0.0.0 → 9.0.5.6nvdUScpe: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 2021-02-18modified 2026-06-17

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+12523 more

references (14)

External citations — patches, advisories, analysis.

scry

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