IBM WebSphere Application Server 8.0, 8.5, 9.0, and Liberty Java Batch is vulnerable to an XML External Entity Injection (XXE) attack when…

published 2021-05-26 5y ago modified 2026-06-17 4mo ago also EUVD-2021-7910

cvss: 6.5; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 2.1%; EPSS 2.1% chance of exploitation in 30 days, percentile 81%
public exploits: 0; none known

IBM WebSphere Application Server 8.0, 8.5, 9.0, and Liberty Java Batch 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: 197793.

Patch / fix

links 1

ibm.com/support/pages/node/6456017 advisory

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Exploit prediction

2.07% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.0	6.5	CVSS:3.0/S:U/C:H/A:L/I:N/AC:H/PR:N/AV:N/UI:N/E:U/RL:O/RC:C
NVD	3.1	8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
CNA	3.0	6.5	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L
NVD	2.0	6.4	AV:N/AC:L/Au:N/C:P/I:N/A:P

Affected products

IBM WebSphere Application Server

Classification

Weakness

CWE-611 Improper Restriction of XML External Entity Reference

References

ibm.com /support/pages/node/6456017
patch, vendor-advisory
exchange.xforce.ibmcloud.com /vulnerabilities/197793
vdb-entry, vendor-advisory

Sources

CVE List CVE-2021-20492
NVD CVE-2021-20492

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