What is CVE-2026-111830?

CVE-2026-111830 is a high-severity vulnerability in Wp Mailster, classified under Cross-site Scripting. CVSS score: 7.1/10. Published 2026-10-22.

How severe is CVE-2026-111830?

High severity. CVSS v3 base score is 7.1 out of 10.

XSS in Wp Mailster

CVE-2026-111830

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WP Mailster WP Mailster wp-mailster allows Stored XSS.This issue affects WP Mailster: from n/a through 1.9.1.0.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-22 · last modified 2026-10-22.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L.

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

Wp Mailster

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

patchstack.com/database/wordpress/plugin/wp-mailster/vulnerability/wordpress-wp… (vdb-entry)

Frequently asked questions

What is CVE-2026-111830?: CVE-2026-111830 is a high-severity vulnerability in Wp Mailster, classified under Cross-site Scripting. CVSS score: 7.1/10. Published 2026-10-22.
How severe is CVE-2026-111830?: High severity. CVSS v3 base score is 7.1 out of 10.