CVE-2021-20354

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-02-18 · updated 2026-06-17
Weakness: CWE-22

Description

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.

Affected products

IBM WebSphere Application Server: from 8.0.0.0 through 8.0.0.15; from 8.5.0.0 through 8.5.5.19; from 9.0.0.0 through 9.0.5.6

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/194883
https://www.ibm.com/support/pages/node/6415959
https://exchange.xforce.ibmcloud.com/vulnerabilities/194883
https://www.ibm.com/support/pages/node/6415959

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