What is CVE-2026-29933?

CVE-2026-29933 is a medium-severity vulnerability in Yzmcms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-26.

How severe is CVE-2026-29933?

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

XSS in Yzmcms

CVE-2026-29933

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-03-26 · last modified 2026-06-17.

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: 0.003 (14.8th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 14.8% 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: 0.003 · change: +0.001

Affected products

Yzmcms — versions 7.4

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/yzmcms/yzmcms/issues/69 (Exploit, Mitigation, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2026-29933?: CVE-2026-29933 is a medium-severity vulnerability in Yzmcms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-26.
How severe is CVE-2026-29933?: Medium severity. CVSS v3 base score is 6.1 out of 10.