What is CVE-2025-56304?

CVE-2025-56304 is a medium-severity vulnerability in Yzmcms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-09-23.

How severe is CVE-2025-56304?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Yzmcms

CVE-2025-56304

Cross-site scripting (XSS) vulnerability in YzmCMS thru 7.3 via the referer header in the register page.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2025-09-23 · last modified 2026-07-05.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (9.1th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Yzmcms

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

yzmcms.com (Product)
www.yzmcms.com/ (Product)
gitee.com/cyjsyj/cve/wikis/CVE-2025-56304 (Third Party Advisory)

Frequently asked questions

What is CVE-2025-56304?: CVE-2025-56304 is a medium-severity vulnerability in Yzmcms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-09-23.
How severe is CVE-2025-56304?: Medium severity. CVSS v3 base score is 6.1 out of 10.