CVE-2023-27554: IBM WebSphere Application Server XML external entity injection

Severity: medium (CVSS 6.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-05-11 · updated 2026-06-17
Weakness: CWE-611

Description

IBM WebSphere Application Server 8.5 and 9.0 is vulnerable to an XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources. IBM X-Force ID: 249185.

Affected products

IBM WebSphere Application Server: from 8.5.0.0 before 8.5.5.24; from 9.0.0.0 before 9.0.5.16 — fixed in 8.5.5.24, 9.0.5.16

How to fix

Upgrade to a fixed version: IBM WebSphere Application Server 8.5.5.24, 9.0.5.16. Check the vendor advisory for mitigations.

References

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