What is the CVSS score of CVE-2026-30560?

CVE-2026-30560 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.1%.

Is there a public PoC exploit available for CVE-2026-30560?

Yes, a public proof-of-concept exploit is available for CVE-2026-30560. Prioritise patching immediately. EPSS: 0.1%.

PHP CVE-2026-30560

EUVD-2026-17099 MEDIUM

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

2026-03-30 mitre

GHSA-v93p-qq7j-v866

XSS PHP

6.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.1 MEDIUM

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

PoC Detected

Apr 06, 2026 - 14:16 vuln.today

Public exploit code

EUVD ID Assigned

Mar 30, 2026 - 16:00 euvd

EUVD-2026-17099

Analysis Generated

Mar 30, 2026 - 16:00 vuln.today

CVE Published

Mar 30, 2026 - 00:00 nvd

MEDIUM 6.1

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_supplier.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 XSS in SourceCodester Sales and Inventory System 1.0 allows remote attackers to inject arbitrary JavaScript or HTML through the msg parameter in add_supplier.php, enabling session hijacking, credential theft, or malware distribution without authentication. The vulnerability has publicly available proof-of-concept code demonstrating the attack vector.

Technical ContextAI

This reflected cross-site scripting vulnerability (CWE-79) occurs in a PHP-based inventory management application where user-supplied input via the msg URL parameter is returned in HTTP responses without proper HTML encoding or sanitization. The add_supplier.php endpoint fails to implement context-appropriate output encoding (such as htmlspecialchars() or similar functions in PHP), allowing attacker-controlled strings to be interpreted as executable scripts by the victim's browser. Reflected XSS differs from stored XSS in that the payload must be delivered via a malicious URL rather than persisted in a database; however, the impact on the victim remains equivalent.

RemediationAI

Implement output encoding on all user-supplied parameters before rendering them in HTML context. In the add_supplier.php file, apply htmlspecialchars($msg, ENT_QUOTES, 'UTF-8') to the msg parameter when echoing it to the page. Additionally, implement input validation to reject or sanitize unexpected characters. If possible, upgrade SourceCodester Sales and Inventory System to a patched version when available; check the vendor's repository (GitHub or official project page) for security updates. Apply a web application firewall (WAF) rule to block requests containing common XSS payloads (script tags, event handlers) as a temporary defense. Reference the proof-of-concept at https://github.com/meifukun/Web-Security-PoCs/blob/main/Inventory-System/XSS-AddSupplier-msg.md to validate that remediation prevents the demonstrated attack.