What is CVE-2026-29934?

CVE-2026-29934 is a medium-severity vulnerability in Lightcms Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-26.

How severe is CVE-2026-29934?

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

XSS in Lightcms Project

CVE-2026-29934

A reflected cross-site scripting (XSS) vulnerability in the /admin/menus component of Lightcms v2.0 allows attackers to execute arbitrary Javascript in the context of the user's browser via modifying the referer 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 2026-10-02.

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: +0.000

Affected products

Lightcms Project — versions 2.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/eddy8/LightCMS/issues/38 (Exploit, Mitigation, Issue Tracking)

Frequently asked questions

What is CVE-2026-29934?: CVE-2026-29934 is a medium-severity vulnerability in Lightcms Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-26.
How severe is CVE-2026-29934?: Medium severity. CVSS v3 base score is 6.1 out of 10.