Vulnerability Details : 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.
Vulnerability category: XML external entity (XXE) injection
Products affected by CVE-2021-27777
- cpe:2.3:a:hcltech:unica:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-27777
0.07%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 30 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-27777
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:P/A:N |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
3.9
|
3.6
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
3.9
|
3.6
|
HCL Software |
CWE ids for CVE-2021-27777
-
The product does not properly neutralize special elements that are used in XML, allowing attackers to modify the syntax, content, or commands of the XML before it is processed by an end system.Assigned by: psirt@hcl.com (Secondary)
-
The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-27777
-
https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0097124
Security Bulletin: Unica Platform is vulnerable to XML External Entity Injection - Customer SupportVendor Advisory
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