XSS in Welcart E-Commerce

CVE-2026-16066

The Welcart e-Commerce WordPress plugin before 2.11.34 does not sanitise or escape a product field before outputting it on the product pages, allowing users with the Author role and above to inject arbitrary web scripts that execute in the browser of any visitor viewing the product page.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

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

EPSS: 0.002 (11.9th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-16066: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.001

Affected products

  • Welcart E-Commerce — versions 0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-16066?
CVE-2026-16066 is a medium-severity vulnerability in Welcart E-Commerce, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-08-12.
How severe is CVE-2026-16066?
Medium severity. CVSS v3 base score is 5.4 out of 10.