CVE-2023-4439Network attack vector

Authenticated account-data alteration via unchecked negative quantities

Published Aug 20, 2023 · Updated Aug 2, 2024

Improper quantity validation in SourceCodester Card Holder Management System 1.0 allows remote authenticated users to alter account data. The Minus Value Handler accepts a negative transaction quantity without enforcing the expected nonnegative range, but the affected function and downstream balance operation are undisclosed. Access requires an account number and PIN, and published evidence establishes data modification without showing disclosure or service interruption.

CVSS severity5.3
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper quantity validation in SourceCodester Card Holder Management System 1.0 allows remote authenticated users to alter account data. The Minus Value Handler accepts a negative transaction quantity without enforcing the expected nonnegative range, but the affected function and downstream balance operation are undisclosed. Access requires an account number and PIN, and published evidence establishes data modification without showing disclosure or service interruption.

The record

CVE
CVE-2023-4439
Published
Aug 20, 2023
Updated
Aug 2, 2024
Vendor
SourceCodester
Product
Card Holder Management System
Classifications
CWE-1284, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SourceCodester · Card Holder Management Systemversion=1.0

Published CVSS scores

5.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
4.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/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.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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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