What is CVE-2026-104479?

CVE-2026-104479 is a medium-severity vulnerability in Mindstellar Shopclass, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-10-03.

How severe is CVE-2026-104479?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Mindstellar Shopclass

CVE-2026-104479

Shopclass before 6.2.0 contains a stored cross-site scripting vulnerability that allows self-registered non-admin users to inject scripts into item listing descriptions when frontend TinyMCE is enabled. Attackers can submit malicious JavaScript, which ItemActions.php saves without tag stripping, causing it to execute in the site origin for any visitor viewing the listing.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-03.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Mindstellar Shopclass

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/mindstellar/shopclass/commit/c196f70906522c9b9172c24f1b42cd0a02357422 (patch)
github.com/mindstellar/shopclass (product)
www.vulncheck.com/advisories/shopclass-before-6.2.0-stored-xss-via-listing-desc… (third-party-advisory)

Frequently asked questions

What is CVE-2026-104479?: CVE-2026-104479 is a medium-severity vulnerability in Mindstellar Shopclass, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-10-03.
How severe is CVE-2026-104479?: Medium severity. CVSS v3 base score is 5.4 out of 10.