CVE-2023-31186Network attack vector

Unauthenticated user enumeration via response discrepancies

Published May 30, 2023 · Updated Jan 10, 2025

Observable response discrepancy in Avaya IX Workforce Engagement 15.2.7.1195 allows remote attackers to enumerate valid users. The public CNA record does not identify the affected request handler or disclose which response difference distinguishes valid from invalid account names. No authentication or user interaction is required, and the disclosed consequence is limited to learning which account identifiers are valid.

CVSS severity5.3
Medium
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Observable response discrepancy in Avaya IX Workforce Engagement 15.2.7.1195 allows remote attackers to enumerate valid users. The public CNA record does not identify the affected request handler or disclose which response difference distinguishes valid from invalid account names. No authentication or user interaction is required, and the disclosed consequence is limited to learning which account identifiers are valid.

The record

CVE
CVE-2023-31186
Published
May 30, 2023
Updated
Jan 10, 2025
Vendor
Avaya
Product
Avaya IX Workforce Engagement
Classifications
CWE-203, CWE-204, T1589
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 10, 2025Record 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=Update to the latest version <v15.2.7.1195*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Avaya · Avaya IX Workforce Engagementversion=Update to the latest version <v15.2.7.1195*

Published CVSS scores

5.3Israel National Cyber DirectorateCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-203Observable Discrepancy
CWE-204Observable Response Discrepancy
T1589Gather Victim Identity Information

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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