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Vulnerability record · CVE-2021-27777 · published 12 May 2022

CVE-2021-27777: Hcltech unica xml injection vulnerability

Hcltech · Unica

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.

7.5 CVSS 3.1 High EPSS 0.83% · top 44.1% CWE-91 · XML injectionCWE-611 · XML external entity (XXE)
7.5CVSS 3.1 base score, v2 5.0
0.83%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-27777), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.