What is CVE-2026-116858?

CVE-2026-116858 is a medium-severity vulnerability in Wpmu Dev Forminator, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 4.3/10. Published 2026-11-03.

How severe is CVE-2026-116858?

Medium severity. CVSS v3 base score is 4.3 out of 10.

XSS in Wpmu Dev Forminator

CVE-2026-116858

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in WPMU DEV Forminator forminator allows Code Injection.This issue affects Forminator: from n/a through 1.58.3.

Published 2026-11-03 · last modified 2026-11-03.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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

Wpmu Dev Forminator

Weakness classification (CWE)

CWE-80 — Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

References

patchstack.com/database/wordpress/plugin/forminator/vulnerability/wordpress-for… (vdb-entry)

Frequently asked questions

What is CVE-2026-116858?: CVE-2026-116858 is a medium-severity vulnerability in Wpmu Dev Forminator, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 4.3/10. Published 2026-11-03.
How severe is CVE-2026-116858?: Medium severity. CVSS v3 base score is 4.3 out of 10.