CVE-2020-4084Network attack vector

Session credential disclosure via Web UI script injection

Published Mar 9, 2020 · Updated Aug 4, 2024

Cross-site scripting in HCL Connections 5.5, 6.0, and 6.5 allows remote authenticated users to run JavaScript in a trusted session. The Web UI accepts and renders user-supplied JavaScript without neutralizing it, but HCL has not identified the affected endpoint or parameter. A victim must click a specially crafted URL; execution occurs in the hosting site's browser context and can expose session credentials.

CVSS severity5.4
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in HCL Connections 5.5, 6.0, and 6.5 allows remote authenticated users to run JavaScript in a trusted session. The Web UI accepts and renders user-supplied JavaScript without neutralizing it, but HCL has not identified the affected endpoint or parameter. A victim must click a specially crafted URL; execution occurs in the hosting site's browser context and can expose session credentials.

The record

CVE
CVE-2020-4084
Published
Mar 9, 2020
Updated
Aug 4, 2024
Vendor
HCL Software
Product
HCL Connections
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 9, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.5
  2. Affected versionversion=6.0
  3. Affected versionversion=6.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

HCL Software · HCL Connectionsversion=5.5; version=6.0; version=6.5

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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