CVE-2026-15665 Cross-site scripting in Fluent Support – Helpdesk & Customer Support Ticket System
Authenticated attackers with contributor access can inject arbitrary scripts via a shortcode attribute, potentially executing code in victim browsers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-15665?
CVE-2026-15665 is a medium-severity cross-site scripting vulnerability in wpmanageninja Fluent Support – Helpdesk & Customer Support Ticket System, published on 24 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Fluent Support – Helpdesk & Customer Support Ticket System plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'redirect-to' Shortcode Attribute in all versions up to, and including, 2.3.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The XSS payload is in a hidden attribute so it only fires in specific browsers when specific access keys are used making exploitation unlikely.
Weakness: CWE-79
Which versions are affected by CVE-2026-15665?
How do I fix CVE-2026-15665?
No fix has been published for CVE-2026-15665 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-2026-15665 being exploited?
There is no known exploitation of CVE-2026-15665 in the wild and no public exploit code.
Sources
Also known as GHSA-64jj-pfw2-rm5w.