CVE-2026-3043 itsourcecode Event Management System navbar.php cross site scripting

Medium 5.3 Published 23 Feb 2026 Updated 25 Feb 2026

Remote attackers can execute arbitrary scripts via the page argument in navbar.php, potentially compromising user sessions.

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-2026-3043?

CVE-2026-3043 is a medium-severity cross-site scripting vulnerability in itsourcecode Event Management System, published on 23 Feb 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 flaw has been found in itsourcecode Event Management System 1.0. The impacted element is an unknown function of the file /admin/navbar.php. Executing a manipulation of the argument page can lead to cross site scripting. The attack may be performed from remote. The exploit has been published and may be used.

Weakness: CWE-94, CWE-79

Which versions are affected by CVE-2026-3043?

It affects 1 product.

Products include Admerc Event Management System.

How do I fix CVE-2026-3043?

No fix has been published for CVE-2026-3043 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-2026-3043 being exploited?

There is no known exploitation of CVE-2026-3043 in the wild and no public exploit code.

Sources

Also known as GHSA-rg2h-mq39-66pf.