Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-21788

Severity CVSS v4.0:
Pending analysis
Type:
CWE-79 Cross-Site Scripting (XSS)
Publication date:
19/03/2026
Last modified:
19/03/2026

Description

HCL Connections is vulnerable to a cross-site scripting attack where an attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user which leads to executing malicious script code.  This may allow the attacker steal cookie-based authentication credentials and comprise user's account then launch other attacks.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 5.40 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): Required
Scope (S): Changed
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

Base Score 3.x
5.40
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:hcltech:connections:8.0:-:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release1:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release10:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release11:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release12:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release2:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release3:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release4:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release5:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release6:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release7:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release8:*:*:*:*:*:*
cpe:2.3:a:hcltech:connections:8.0:cumulative_release9:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools