CVE-2021-27777: Hcltech Unica

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

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

• Hcltech Unica: before 12.1.1 (fixed in 12.1.1)

Published 2022-05-12. Last modified 2026-06-17.