CVE-2026-21788— HCL Connections is vulnerable to cross-site scripting (XSS)
Quick assessment
Affected
HCLSoftware Connections
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
HCL Connections是印度HCL公司的一套企业协作平台。 HCL Connections存在安全漏洞，该漏洞源于容易受到跨站脚本攻击，攻击者可能利用此问题在不知情用户的浏览器中执行任意脚本代码，从而窃取基于cookie的身份验证凭据并危害用户账户。
Possible ATT&CK Techniques 3 AI
T1059 · Command and Scripting Interpreter T1189 · Drive-by Compromise T1539 · Steal Web Session Cookie
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I. Basic Information for CVE-2026-21788
Vulnerability Information
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Vulnerability Title
HCL Connections is vulnerable to cross-site scripting (XSS)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
HCL Connections 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HCL Connections是印度HCL公司的一套企业协作平台。 HCL Connections存在安全漏洞，该漏洞源于容易受到跨站脚本攻击，攻击者可能利用此问题在不知情用户的浏览器中执行任意脚本代码，从而窃取基于cookie的身份验证凭据并危害用户账户。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| HCLSoftware | Connections | 8 | - |
|
II. Public POCs for CVE-2026-21788
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-21788 (1)
IV. Related Vulnerabilities
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V. Comments for CVE-2026-21788
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