CVE-2026-15202 YzmCMS Header yzmphp.php get_url cross site scripting
Remote attackers can execute arbitrary scripts via the HTTP_HOST header in YzmCMS, potentially compromising user sessions and data.
- 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-2026-15202?
CVE-2026-15202 is a medium-severity cross-site scripting vulnerability in YzmCMS, published on 9 Jul 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 security vulnerability has been detected in YzmCMS up to 7.5. Affected is the function get_url of the file /yzmphp/yzmphp.php of the component Header Handler. The manipulation of the argument HTTP_HOST leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-15202?
How do I fix CVE-2026-15202?
No fix has been published for CVE-2026-15202 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-2026-15202 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15202 exists.
Sources
Also known as GHSA-8h66-74hr-gcf7.