CVE-2021-35337Public exploitNetwork attack vector

Cross-user invoice disclosure via ID parameter

Published Jul 1, 2021 · Updated Aug 4, 2024

Insecure direct object reference in Sourcecodester Phone Shop Sales Managements System 1.0 allows remote authenticated users to view other users' invoices. The invoice endpoint uses a caller-supplied id parameter to select records without enforcing ownership or authorization for the referenced invoice. Access requires a valid application session, and the demonstrated consequence is disclosure of invoice data belonging to other users.

CVSS severity4.3
Medium
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insecure direct object reference in Sourcecodester Phone Shop Sales Managements System 1.0 allows remote authenticated users to view other users' invoices. The invoice endpoint uses a caller-supplied id parameter to select records without enforcing ownership or authorization for the referenced invoice. Access requires a valid application session, and the demonstrated consequence is disclosure of invoice data belonging to other users.

The record

CVE
CVE-2021-35337
Published
Jul 1, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-639, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 1, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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

4.0NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
4.3NVDCVSS: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

CWE-639Insecure Direct Object Reference
T1213Data from Information Repositories

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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