CVE-2026-5790 Stored Cross-Site Scripting (XSS) vulnerability in Stel Order
Attackers can inject persistent scripts via legalName and employeeID parameters to steal session cookies and hijack user accounts.
- 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-2026-5790?
CVE-2026-5790 is a medium-severity cross-site scripting vulnerability in Stel Order, published on 14 May 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
Stored Cross-Site Scripting (XSS) in Stel Order v3.25.1 and earlier, located at the ‘/app/FrontController’ endpoint via the ‘legalName’ and ‘employeeID’ parameters. The lack of proper input sanitization allows an attacker to inject malicious code that is persistently stored in the database. When other users or administrators access the affected sections, the code executes in their browsers, enabling the theft of session cookies and account hijacking.
Weakness: CWE-79
Which versions are affected by CVE-2026-5790?
How do I fix CVE-2026-5790?
No fix has been published for CVE-2026-5790 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-2026-5790 being exploited?
There is no known exploitation of CVE-2026-5790 in the wild and no public exploit code.
Sources
Also known as GHSA-vjqx-vf5x-gc8m.