CVE-2026-21788 MEDIUM

CVE-2026-21788: HCL Connections is vulnerable to cross-site scripting (XSS)

Vendor Hclsoftware
Product Connections
Weakness CWE-79 · XSS
Published March 19, 2026
Last update March 19, 2026

CVSS base score

5.4/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 19, 2026 CVE published
March 19, 2026 Record updated