Is CVE-2025-56304 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2025-56304 being exploited in the wild.

How severe is CVE-2025-56304?

Medium severity, with a CVSS score of 6.1, published 23 September 2025.

Which products and versions are affected?

YzmCMS up to and including 7.3.

Is there a fix for CVE-2025-56304?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2025-56304 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2025-56304?

Check whether you run YzmCMS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2025-56304: YzmCMS cross-site scripting in register page referer header

CVE-2025-56304 · Severity: medium · CVSS 6.1 · Published 2025-09-23

YzmCMS, a content management system used for building websites, contains a security flaw in its registration page. An attacker can trick a user into clicking a malicious link that executes unauthorized scripts in the user's browser. This could lead to the theft of login session information or the performance of unauthorized actions on behalf of the user.

Technologies: YzmCMS. Vendors: YzmCMS.

Quick answers

Is CVE-2025-56304 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2025-56304 being exploited in the wild.
How severe is CVE-2025-56304?: Medium severity, with a CVSS score of 6.1, published 23 September 2025.
Which products and versions are affected?: YzmCMS up to and including 7.3.
Is there a fix for CVE-2025-56304?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2025-56304 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2025-56304?: Check whether you run YzmCMS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A reflected Cross-Site Scripting (XSS) vulnerability exists in YzmCMS through version 7.3. The vulnerability is located in the registration page, where the application fails to properly sanitize the HTTP Referer header before reflecting it back into the page source. An unauthenticated remote attacker can exploit this by enticing a user to visit a specially crafted URL or a malicious site that redirects to the registration page with a malicious payload in the Referer header. Successful exploitation allows the execution of arbitrary JavaScript in the context of the victim's browser session, potentially leading to session hijacking or unauthorized data access.

Affected products

YzmCMS YzmCMS up to and including 7.3

Timeline

2025-09-23: advisory: Initial NVD publication

References

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