CVE-2024-53476Public exploitNetwork attack vector

Inventory overselling via non-atomic stock updates

Published Dec 27, 2024 · Updated Dec 28, 2024

Race condition in SimplCommerce at commit 230310c8d7a0408569b292c5a805c459d47a1d8f allows remote attackers to oversell stock via concurrent checkouts. The CreateOrder method in OrderService.cs checks availability and later updates stock without an atomic transaction or lock, so concurrent requests can observe the same available quantity. Exploitation requires simultaneous checkouts from multiple accounts for the same limited-stock item; duplicate orders can drive inventory negative and leave orders unfulfilled.

CVSS severity5.9
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in SimplCommerce at commit 230310c8d7a0408569b292c5a805c459d47a1d8f allows remote attackers to oversell stock via concurrent checkouts. The CreateOrder method in OrderService.cs checks availability and later updates stock without an atomic transaction or lock, so concurrent requests can observe the same available quantity. Exploitation requires simultaneous checkouts from multiple accounts for the same limited-stock item; duplicate orders can drive inventory negative and leave orders unfulfilled.

The record

CVE
CVE-2024-53476
Published
Dec 27, 2024
Updated
Dec 28, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-362, CAPEC-29, CAPEC-26, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.9CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CAPEC-29Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
CAPEC-26Leveraging Race Conditions
T1565.001Stored Data Manipulation

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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