CVE-2024-23557Network attack vector

Account enumeration via undisclosed user-validity oracle

Published Apr 18, 2024 · Updated Aug 7, 2024

User enumeration in HCL Connections 7.0 and 8.0 allows remote authenticated users to determine whether submitted user identities are valid. HCL has not published the affected action, request field, response difference, or other operation that reveals account validity. Access requires low privileges and user interaction; disclosed impact is limited to an account-validity oracle that can support brute-force attempts.

CVSS severity3.5
Low
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

User enumeration in HCL Connections 7.0 and 8.0 allows remote authenticated users to determine whether submitted user identities are valid. HCL has not published the affected action, request field, response difference, or other operation that reveals account validity. Access requires low privileges and user interaction; disclosed impact is limited to an account-validity oracle that can support brute-force attempts.

The record

CVE
CVE-2024-23557
Published
Apr 18, 2024
Updated
Aug 7, 2024
Vendor
HCL Software
Product
HCL Connections
Classifications
CWE-200, T1087
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 7, 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=7.0
  2. Affected versionversion=7.0, 8.0
  3. Affected versionversion=8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

HCL Software · HCL Connectionsversion=7.0; version=7.0, 8.0; version=8.0

Published CVSS scores

3.5HCL SoftwareCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
4.3NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1087Account Discovery

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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