CVE-2024-25635Public exploitNetwork attack vector

Cross-organization data access via unchecked user identifier

Published Feb 19, 2024 · Updated Aug 28, 2024

Improper authorization in alf.io before 2.0-M4-2402 allows remote authenticated users to read other organizations' user and API-key data. The GET /admin/api/users/{user_id} handler accepts an arbitrary numeric user identifier and returns the matching record without limiting it to the requester's organization. Organization-owner access and a multi-tenant deployment are required; a disclosed API key grants access to and modification of another organization's data.

CVSS severity8.8
High
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in alf.io before 2.0-M4-2402 allows remote authenticated users to read other organizations' user and API-key data. The GET /admin/api/users/{user_id} handler accepts an arbitrary numeric user identifier and returns the matching record without limiting it to the requester's organization. Organization-owner access and a multi-tenant deployment are required; a disclosed API key grants access to and modification of another organization's data.

The record

CVE
CVE-2024-25635
Published
Feb 19, 2024
Updated
Aug 28, 2024
Vendor
Alf.io
Product
alf.io
Classifications
CWE-612, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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 <2.0-M4-2402
  2. Affected versionversion=< 2.0-M4-2402

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Alf.io · alf.ioversion=0 <2.0-M4-2402; version=< 2.0-M4-2402

Published CVSS scores

8.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8NISTCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-612Improper Authorization of Index Containing Sensitive Information
T1190Exploit Public-Facing Application

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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