CVE-2024-39211Public exploitNetwork attack vector

Unauthenticated account enumeration via conditional email disclosure

Published Jul 4, 2024 · Updated Aug 22, 2024

Observable response discrepancy in Kaiten 57.128.8 allows remote attackers to enumerate user accounts through the login endpoint. The POST /login handler returns a user_email field only when the submitted username belongs to an existing account. No authentication is required, and repeated username guesses disclose valid account names and associated email addresses.

CVSS severity5.3
Medium
EPSS probability1.14%
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 Kaiten 57.128.8 allows remote attackers to enumerate user accounts through the login endpoint. The POST /login handler returns a user_email field only when the submitted username belongs to an existing account. No authentication is required, and repeated username guesses disclose valid account names and associated email addresses.

The record

CVE
CVE-2024-39211
Published
Jul 4, 2024
Updated
Aug 22, 2024
Vendor
Kaiten Software
Product
Kaiten
Classifications
CWE-204, T1087
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 22, 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=57.128.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Kaiten Software · Kaitenversion=57.128.8

Published CVSS scores

5.3CISA-ADPCVSS: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.

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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 exploitPublished

Weakness, pattern, technique

CWE-204Observable Response Discrepancy
T1087Account Discovery

Public exploit references

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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