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TI-2021-03720 Aliases CVE-2021-20454GHSA-hfxg-757p-q6w7

XML external entity injection in IBM WebSphere Application Server

Priority MEDIUM 41CWE-611Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · Low
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 is vulnerable to a 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: 196649.

Why it matters now

EPSS 0.02795 86th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
IBMWebSphere Application Server7.0; 8.0; 8.5; 9.0—No fix listedCNA
  • WebSphere Application Server VendorIBM Affected 7.0; 8.0; 8.5; 9.0 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:-:*:*:*7.0.0.0 – 7.0.0.45; 8.0.0.0 – 8.0.0.15VulnerableIBM
cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:*:*:*:*8.5.0.0 – 8.5.5.19; 9.0.0.0 – 9.0.5.7VulnerableIBM
  • cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:-:*:*:* Versions 7.0.0.0 – 7.0.0.45; 8.0.0.0 – 8.0.0.15 Vulnerable ·IBM
  • cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:*:*:*:* Versions 8.5.0.0 – 8.5.5.19; 9.0.0.0 – 9.0.5.7 Vulnerable ·IBM

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-20454
  2. 2026-10-03 Alias added: GHSA-hfxg-757p-q6w7

References

Advisory 1

  • TI-2015-06198 Serialized-object interfaces in certain IBM analytics, business solutions, cognitive, IT… KEVCVSS 3.1CRITICAL 9.8
  • TI-2010-00403 modules/arch/win32/mod_isapi.c in mod_isapi in the Apache HTTP Server 2.0.37 through… CVSS 2.0HIGH 10.0
  • TI-2019-03185 Deserialization of untrusted data in IBM WebSphere Application Server CVSS 3.1CRITICAL 9.8
  • TI-2020-03809 Deserialization of untrusted data in IBM WebSphere Application Server CVSS 3.1CRITICAL 9.8
  • TI-2025-24648 IBM WebSphere Application Server code execution CVSS 3.1CRITICAL 9.8
  • TI-2020-03807 Deserialization of untrusted data in IBM WebSphere Application Server CVSS 3.1CRITICAL 9.8
See all 502 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences