XML External Entity injection in IBM WebSphere Application Server - CVE-2021-20353

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Main Vulnerability Database Vulnerabilities #VU50683

XML External Entity injection in IBM WebSphere Application Server - CVE-2021-20353

Published: February 15, 2021


Vulnerability identifier: #VU50683
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-20353
CWE-ID: CWE-611
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied XML input within the EDataGraphImpl class. A remote attacker can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.

Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.


Affected software

IBM WebSphere Application Server
IBM Tivoli Monitoring

How to mitigate CVE-2021-20353

Install updates from vendor's website.

IBM WebSphere Application Server - addressed in versions 8.5.5.20, 9.0.5.7
IBM Tivoli Monitoring - update to 6.3.0.7 Plus Service Pack 5

External References

Related Security Bulletins