CVE-2024-24766Public exploitNetwork attack vector

Username enumeration via distinct login errors

Published Mar 6, 2024 · Updated Aug 1, 2024

Observable response discrepancy in CasaOS-UserService 0.4.4.3 through 0.4.6 allows remote attackers to enumerate usernames. PostUserLogin in route/v1/user.go returns a user-not-found result for an unknown username but a password-invalid result for a known username. The unauthenticated login endpoint exposes only account-name validity, enabling targeted password attacks without granting account access.

CVSS severity6.2
Medium
EPSS probability0.76%
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 CasaOS-UserService 0.4.4.3 through 0.4.6 allows remote attackers to enumerate usernames. PostUserLogin in route/v1/user.go returns a user-not-found result for an unknown username but a password-invalid result for a known username. The unauthenticated login endpoint exposes only account-name validity, enabling targeted password attacks without granting account access.

The record

CVE
CVE-2024-24766
Published
Mar 6, 2024
Updated
Aug 1, 2024
Vendor
IceWhale Technology Limited
Product
CasaOS-UserService
Classifications
CWE-204, T1087
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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=>= 0.4.4.3, < 0.4.7
  2. Affected versionversion=0.4.4.3 <0.4.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IceWhale Technology Limited · CasaOS-UserServiceversion=>= 0.4.4.3, < 0.4.7; version=0.4.4.3 <0.4.7

Published CVSS scores

7.5National Institute of Standards and TechnologyCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
6.2GitHub, Inc.CVSS:3.1/AV:L/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
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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