# CVE-2026-11589: WP Support Plus Responsive Ticket System unauthenticated stored XSS via file upload

Source: https://junglewise.ai/threats/cve-2026-11589-wp-support-plus-responsive-ticket-system-unauthenticated-stored  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-30. Updated: 2026-06-30  
License: CC BY 4.0 with a link back

CVE-2026-11589 · Severity: info · CVSS 8.8 · Published 2026-06-30

The WP Support Plus Responsive Ticket System plugin for WordPress, which provides customer support ticketing functionality, contains a security flaw in its file upload system. This vulnerability allows anyone on the internet to upload malicious files to the website without needing to log in. If a site visitor or administrator views these files, an attacker could steal login sessions, redirect users to malicious websites, or perform actions on behalf of the administrator.

Technologies: [WP Support Plus Responsive Ticket System](https://junglewise.ai/threats/technologies/wp-support-plus-responsive-ticket-system). Vendors: [WP Support Plus](https://junglewise.ai/threats/vendors/wp-support-plus).

## Quick answers

**Is CVE-2026-11589 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-11589 being exploited in the wild.

**How severe is CVE-2026-11589?** Informational severity, with a CVSS score of 8.8, published 30 June 2026.

**Which products and versions are affected?** WP Support Plus Responsive Ticket System <= 9.1.2.

**Is there a fix for CVE-2026-11589?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-11589 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-11589?** Check whether you run WP Support Plus Responsive Ticket System at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A stored cross-site scripting (XSS) vulnerability exists in the WP Support Plus Responsive Ticket System plugin through version 9.1.2 due to insufficient validation of uploaded files. Unauthenticated attackers can upload files containing malicious JavaScript, such as HTML or SVG files, to a publicly accessible directory on the server. When these files are accessed by other users or administrators, the embedded script executes in the context of their browser session. This can lead to session hijacking, unauthorized administrative actions, or site defacement. As of the advisory date, no known fix is available.

## Affected products

- Unknown WP Support Plus Responsive Ticket System <= 9.1.2

## Timeline

- 2026-06-09: disclosed: Publicly published via WPScan
- 2026-06-30: advisory: CVE published in NVD dataset

## References

- [https://wpscan.com/vulnerability/c46479c2-4eef-485f-ae98-1f487efa4263/](https://wpscan.com/vulnerability/c46479c2-4eef-485f-ae98-1f487efa4263/)

## Related threats

- [WP Support Plus Responsive Ticket System session cookie forgery](https://junglewise.ai/threats/cve-2026-11875-wp-support-plus-responsive-ticket-system-session-cookie-forgery)
- [WP Support Plus Responsive Ticket System unauthenticated SQL injection](https://junglewise.ai/threats/cve-2026-11590-wp-support-plus-responsive-ticket-system-unauthenticated-sql)