CVE-2021-3005Public exploitNetwork attack vector

Invoice disclosure via unchecked titulo ownership

Published Jan 3, 2021 · Updated Aug 3, 2024

IDOR in MK-AUTH 19.01 K4.9 and earlier allows remote authenticated users to read other customers' invoices through its web portal. The central/recibo.php handler trusts the user-controlled titulo invoice key without verifying that the requested invoice belongs to the authenticated account. Any ISP customer with platform access can enumerate another customer's invoice and obtain disclosed personal data such as a CPF number.

CVSS severity4.3
Medium
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IDOR in MK-AUTH 19.01 K4.9 and earlier allows remote authenticated users to read other customers' invoices through its web portal. The central/recibo.php handler trusts the user-controlled titulo invoice key without verifying that the requested invoice belongs to the authenticated account. Any ISP customer with platform access can enumerate another customer's invoice and obtain disclosed personal data such as a CPF number.

The record

CVE
CVE-2021-3005
Published
Jan 3, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1213.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 3, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1213.004Data from Information Repositories Customer Relationship Management Software

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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