Vulnerability Database

315,294

Total vulnerabilities in the database

CVE-2021-27777

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.

  • Published: May 12, 2022
  • Updated: Nov 16, 2025
  • CVE: CVE-2021-27777
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v2:

  • Severity: Medium
  • Score: 5
  • AV:N/AC:L/Au:N/C:N/I:P/A:N

CWEs:

OWASP TOP 10:

Software From Fixed in
hcltech / unica - 12.1.1