Home/CVE/XML External Entity (XXE) injection vulnerabilities occur when poorly configured XML parsers process user supplied input
CVE

CVE-2021-27777

XML External Entity (XXE) injection vulnerabilities occur when poorly configured XML parsers process user supplied input

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.

HIGH · CVSS 7.5 EPSS 0.003
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
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Weakness Classification

CWE-611Improper Restriction of XML External Entity Reference
CWE-91XML Injection (aka Blind XPath Injection)
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Affected Products & Versions

1
hcltech unica< 12.1.1
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Scoring & Timeline

7.5
HIGH · CVSS v3.1 · psirt@hcl.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 May 2022 · 10:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0097124Vendor Advisory
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