What is CVE-2026-11589?

CVE-2026-11589 is a high-severity vulnerability in Wp Support Plus Responsive Ticket System, classified under CWE-79 CROSS-SITE SCRIPTING (XSS). CVSS score: 8.8/10. Published 2026-06-30.

How severe is CVE-2026-11589?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Wp Support Plus Responsive Ticket System

CVE-2026-11589

The WP Support Plus Responsive Ticket System WordPress plugin through 9.1.2 does not properly validate uploaded files, allowing unauthenticated users to upload files containing malicious JavaScript (such as HTML or SVG) to a publicly accessible location, leading to Stored Cross-Site Scripting attacks against site users and administrators.

Published 2026-06-30 · last modified 2026-06-30.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (41.2th percentile), scored 2026-10-08.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Wp Support Plus Responsive Ticket System — versions 0

References

wpscan.com/vulnerability/c46479c2-4eef-485f-ae98-1f487efa4263/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-11589?: CVE-2026-11589 is a high-severity vulnerability in Wp Support Plus Responsive Ticket System, classified under CWE-79 CROSS-SITE SCRIPTING (XSS). CVSS score: 8.8/10. Published 2026-06-30.
How severe is CVE-2026-11589?: High severity. CVSS v3 base score is 8.8 out of 10.