Vulnerability details

CVE-2026-30575

CVSS 3.1

7.5High

Official description

A Business Logic vulnerability exists in SourceCodester Pharmacy Product Management System 1.0 in the add-stock.php file. The application fails to validate the "txtqty" parameter during stock entry, allowing negative values to be processed. This causes the system to decrease the inventory level instead of increasing it, leading to inventory corruption and potential Denial of Service by depleting stock records.

CVSS scores

Score	Version	Source	Vector
7.5High	3.1	CISA ADP / Vulnrichment (CISA-ADP)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`

Affected products

Vendor	Product	Versions	Source
No product information recorded.

References and advisories

https://github.com/meifukun/Web-Security-PoCs/blob/main/Pharmacy-Product-Management-System/Logic-AddStock-NegativeQty.md

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Details

Published: 2026-03-27
Last updated: 2026-03-27
State: Published
Assigner (CNA): mitre

Exploit prediction (EPSS)

0.42%

Probability of exploitation in 30 days

37.2%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: Proof of concept
Technical impact: Partial

Weaknesses (CWE)

CWE-1284
Improper Validation of Specified Quantity in Input
CWE-20
Improper Input Validation