CVE-2026-21788
Received Received - Intake
Cross-Site Scripting in HCL Connections Enables Account Hijacking

Publication date: 2026-03-19

Last updated on: 2026-03-19

Assigner: HCL Software

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.
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Meta Information
Published
2026-03-19
Last Modified
2026-03-19
Generated
2026-06-16
AI Q&A
2026-03-19
EPSS Evaluated
2026-06-14
NVD
CVE-2026-21788
EUVD
EUVD-2026-13075
Affected Vendors & Products
Showing 13 associated CPEs
Vendor Product Version / Range
hcltech connections 8.0
hcltech connections 8.0
hcltech connections 8.0
hcltech connections 8.0
hcltech connections 8.0
hcltech connections 8.0
hcltech connections 8.0
hcltech connections 8.0
hcltech connections 8.0
hcltech connections 8.0
hcltech connections 8.0
hcltech connections 8.0
hcltech connections 8.0
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

HCL Connections is vulnerable to a cross-site scripting (XSS) attack where an attacker can execute arbitrary script code in the browser of an unsuspecting user.

This malicious script execution can lead to the attacker stealing cookie-based authentication credentials, compromising the user's account, and potentially launching further attacks.

Impact Analysis

The vulnerability allows attackers to execute malicious scripts in your browser, which can result in the theft of your authentication cookies.

This can lead to your user account being compromised, enabling attackers to impersonate you and perform unauthorized actions.

Additionally, attackers may use this access to launch further attacks against you or your organization.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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