CVE-2026-30556 Cross-site scripting in n/a

Medium 6.1 Published 30 Mar 2026 Updated 31 Mar 2026

Remote attackers can inject arbitrary web script via the msg parameter in the Sales and Inventory System, potentially leading to session hijacking or malicious actions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-30556?

CVE-2026-30556 is a medium-severity cross-site scripting vulnerability in n/a, published on 30 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A Reflected Cross-Site Scripting (XSS) vulnerability exists in SourceCodester Sales and Inventory System 1.0. The vulnerability is located in the index.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.

Weakness: CWE-79

Which versions are affected by CVE-2026-30556?

It affects 1 product.

Products include Ahsanriaz26gmailcom Sales and Inventory System.

How do I fix CVE-2026-30556?

No fix has been published for CVE-2026-30556 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-30556 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-30556 exists.

Sources

Also known as GHSA-4cq8-w5ch-hhg7.