What is the CVSS score of EUVD-2026-17101?

EUVD-2026-17101 has a CVSS 3.1 base score of 9.3 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N. EPSS exploitation probability: 0.0%.

Is there a public PoC exploit available for EUVD-2026-17101?

Yes, a public proof-of-concept exploit is available for EUVD-2026-17101. Prioritise patching immediately. EPSS: 0.0%.

PHP EUVD-2026-17101

| CVE-2026-30562 CRITICAL

Cross-site Scripting (XSS) (CWE-79)

2026-03-30 mitre

GHSA-5cjp-jw39-92hv

XSS PHP

9.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.3 CRITICAL

AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

PoC Detected

Apr 01, 2026 - 16:23 vuln.today

Public exploit code

EUVD ID Assigned

Mar 30, 2026 - 16:00 euvd

EUVD-2026-17101

Analysis Generated

Mar 30, 2026 - 16:00 vuln.today

CVE Published

Mar 30, 2026 - 00:00 nvd

CRITICAL 9.3

DescriptionCVE.org

A Reflected Cross-Site Scripting (XSS) vulnerability exists in SourceCodester Sales and Inventory System 1.0. The vulnerability is located in the add_stock.php file via the "msg" parameter. The application fails to sanitize the input, allowing remote attackers to inject arbitrary web script or HTML via a crafted URL.

AnalysisAI

Reflected Cross-Site Scripting (XSS) in SourceCodester Sales and Inventory System 1.0 allows remote attackers to inject arbitrary web script or HTML via the unvalidated 'msg' parameter in add_stock.php. The vulnerability is publicly demonstrated with available proof-of-concept code, enabling attackers to execute malicious scripts in users' browsers without requiring authentication or special privileges.

Technical ContextAI

The vulnerability is a Reflected XSS flaw (CWE category: improper input sanitization) affecting a PHP-based inventory management application. The add_stock.php file fails to sanitize or encode user-supplied input from the 'msg' parameter before rendering it in the HTTP response, allowing injection of JavaScript code or HTML markup. Reflected XSS occurs when attacker-controlled input is echoed back to the user in the same request without sanitization, enabling execution of arbitrary scripts within the victim's browser context when visiting a malicious URL. This is a common vulnerability in PHP applications that directly output user input without filtering or HTML entity encoding.

RemediationAI

Immediate remediation requires input validation and output encoding in add_stock.php: (1) Validate the 'msg' parameter to accept only expected input formats (whitelist approach), (2) HTML-encode all user-supplied input before rendering in the response using functions like htmlspecialchars() or htmlentities() in PHP, (3) Implement Content Security Policy (CSP) headers to prevent inline script execution. Contact SourceCodester for a patched version; if unavailable, apply the encoding fixes manually or disable the add_stock.php endpoint until a vendor update is released. The public proof-of-concept at https://github.com/meifukun/Web-Security-PoCs/blob/main/Inventory-System/XSS-AddStock-msg.md documents the vulnerability and can be used for validation testing after remediation.