CVE-2026-21788
Cross-Site Scripting in HCL Connections Enables Account Hijacking
Publication date: 2026-03-19
Last updated on: 2026-03-19
Assigner: HCL Software
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| 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 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know