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CVE-2026-21788

HCL Connections is vulnerable to cross-site scripting (XSS)

Published: Mar 19, 2026Updated: Mar 19, 2026 Sources: CVE List NVDCWE-79
NVD MITRE
5.4CVSSMEDIUM
EPSS Score
0.2%
Top 94.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:RS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

ConnectionsHCLSoftware
On-prem
Enterprise Software / itsm-monitoring
connectionshcltech
On-premWeb App
Enterprise Software / collaboration-groupware
hclsoftwarecommercialEnterprise Software
hcltechcommercialINEnterprise Softwareaka hcl tech, hcltech

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0129107
support.hcl-software.com

Timeline

Published
Mar 19, 2026
Last Updated
Mar 19, 2026

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