CVE-2024-28232Public exploitNetwork attack vector

Username enumeration via distinct login error codes

Published Apr 1, 2024 · Updated Aug 2, 2024

Username enumeration in IceWhale Technology Limited CasaOS-UserService 0.4.7 allows remote attackers to identify valid accounts. The PostUserLogin handler returns USER_NOT_EXIST for an unknown name but USER_NOT_EXIST_OR_PWD_INVALID when the name exists and the password is wrong. The unauthenticated login endpoint exposes only account existence; published evidence shows no password disclosure, data modification, or service interruption.

CVSS severity6.2
Medium
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Username enumeration in IceWhale Technology Limited CasaOS-UserService 0.4.7 allows remote attackers to identify valid accounts. The PostUserLogin handler returns USER_NOT_EXIST for an unknown name but USER_NOT_EXIST_OR_PWD_INVALID when the name exists and the password is wrong. The unauthenticated login endpoint exposes only account existence; published evidence shows no password disclosure, data modification, or service interruption.

The record

CVE
CVE-2024-28232
Published
Apr 1, 2024
Updated
Aug 2, 2024
Vendor
IceWhale Technology Limited
Product
CasaOS-UserService
Classifications
CWE-204, T1589.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 1, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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== 0.4.7
  2. Affected versionversion=0.4.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IceWhale Technology Limited · CasaOS-UserServiceversion== 0.4.7; version=0.4.7

Published CVSS scores

6.2GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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
T1589.001Credentials

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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