CVE-2026-3819 SourceCodester Resort Reservation System Reservation Management page cross site scripting

Medium 5.1 Published Updated

Remote attackers can inject malicious scripts via the ID parameter in the Reservation Management module, potentially compromising user sessions.

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-2026-3819?

CVE-2026-3819 is a medium-severity cross-site scripting vulnerability in SourceCodester Resort Reservation System, published on 9 Mar 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

A vulnerability has been found in SourceCodester Resort Reservation System 1.0. The affected element is an unknown function of the file /?page=manage_reservation of the component Reservation Management Module. Such manipulation of the argument ID leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-94, CWE-79

Which versions are affected by CVE-2026-3819?

It affects 1 product.

Products include Oretnom23 Resort Reservation System.

How do I fix CVE-2026-3819?

No fix has been published for CVE-2026-3819 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-2026-3819 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3819 exists.

Sources

Also known as GHSA-mwmg-5xrm-69r4.

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