CVE-2026-11589
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk7th percentile - higher than 7% of all known CVEs
Summary
The WP Support Plus Responsive Ticket System WordPress plugin through version 9.1.2 fails to 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.
Risk Assessment
An attacker can inject a persistent script that executes in the browsers of site visitors, potentially leading to session theft, administrator account takeover, or malware distribution.
Recommendation
Immediately update the WP Support Plus Responsive Ticket System plugin to the latest available version or remove it if not essential, and implement file type validation and antivirus scanning for uploaded files.
Other vulnerabilities in WP Support Plus Responsive Ticket System
See all- CVE-2026-11875Medium
The WP Support Plus Responsive Ticket System WordPress plugin through version 9.1.2 does not sign or verify its guest-session cookie, allowing unauthenticated attackers to forge it and impersonate any ticket owner (identified by email address) to read, reply to, and close that person's support tickets.
- CVE-2026-11590High
The WP Support Plus Responsive Ticket System WordPress plugin up to version 9.1.2 does not sanitize user-supplied array keys before using them in a SQL statement, allowing unauthenticated users to perform SQL injection attacks.
Original NVD description (English source)
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.