CVE-2026-39380 Open Source Point of Sale has Stored XSS in Stock Location (Configuration)

Medium 5.4 Published 7 Apr 2026 Updated 8 Apr 2026

Attackers can inject malicious JavaScript via the stock location configuration, leading to code execution in the employee interface.

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

What is CVE-2026-39380?

CVE-2026-39380 is a medium-severity cross-site scripting vulnerability in opensourcepos, published on 7 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Open Source Point of Sale is a web based point-of-sale application written in PHP using CodeIgniter framework. Prior to 3.4.3, a Stored Cross-Site Scripting (XSS) vulnerability exists in the Stock Locations configuration feature. The application fails to properly sanitize user input supplied through the stock_location parameter, allowing attackers to inject malicious JavaScript code that is stored in the database and executed when rendered in the Employees interface. This vulnerability is fixed in 3.4.3.

Weakness: CWE-79

Which versions are affected by CVE-2026-39380?

It affects 1 product.

Products include Opensourcepos Open Source Point of Sale.

How do I fix CVE-2026-39380?

No fix has been published for CVE-2026-39380 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-2026-39380 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39380 exists.

Sources

Also known as GHSA-7hg5-68rx-xpmg.