CVE-2021-27777: HCL Unica Platform is vulnerable to XML External Entity (XXE) injection

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-05-12 · updated 2026-06-17
Weakness: CWE-91

Description

XML External Entity (XXE) injection vulnerabilities occur when poorly configured XML parsers process user supplied input without sufficient validation. Attackers can exploit this vulnerability to manipulate XML content and inject malicious external entity references.

Affected products

HCL Software HCL Unica Platform: before 12.1.1 — fixed in 12.1.1

How to fix

Upgrade to a fixed version: HCL Software HCL Unica Platform 12.1.1. Check the vendor advisory for mitigations.

References

https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0097124
https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0097124

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