CVE-2026-11589 WP Support Plus Responsive Ticket System <= 9.1.2 - Unauthenticated Stored XSS via File Upload
Unauthenticated attackers can upload malicious files to trigger stored XSS, potentially compromising site users and administrators.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-11589?
CVE-2026-11589 is a high-severity cross-site scripting vulnerability in Unknown WP Support Plus Responsive Ticket System, published on 30 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Which versions are affected by CVE-2026-11589?
How do I fix CVE-2026-11589?
No fix has been published for CVE-2026-11589 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-11589 being exploited?
There is no known exploitation of CVE-2026-11589 in the wild and no public exploit code.
Sources
Also known as GHSA-w4vj-qmqh-q69w.