CVE-2026-29933 Cross-site scripting in n/a

Medium 6.1 Published 26 Mar 2026 Updated 30 Mar 2026

Attackers can execute arbitrary JavaScript in user browsers via a reflected XSS vulnerability in the YZMCMS login component.

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-2026-29933?

CVE-2026-29933 is a medium-severity cross-site scripting vulnerability in n/a, published on 26 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 in the /index/login.html component of YZMCMS v7.4 allows attackers to execute arbitrary Javascript in the context of the user's browser via modifying the referrer value in the request header.

Weakness: CWE-79

Which versions are affected by CVE-2026-29933?

It affects 1 product.

Products include Yzmcms Yzmcms.

How do I fix CVE-2026-29933?

No fix has been published for CVE-2026-29933 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-2026-29933 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-29933 exists.

Sources

Also known as GHSA-m982-7wj6-525g.