CVE-2026-25369 WordPress Flexmls® IDX plugin <= 3.15.9 - Reflected Cross Site Scripting (XSS) vulnerability
Attackers can execute arbitrary scripts in victim browsers via reflected XSS in the Flexmls IDX WordPress plugin.
- 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-2026-25369?
CVE-2026-25369 is a high-severity cross-site scripting vulnerability in Flexmls® IDX, published on 16 Mar 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
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in flexmls Flexmls® IDX flexmls-idx allows Reflected XSS.This issue affects Flexmls® IDX: from n/a through <= 3.15.9.
Weakness: CWE-79
Which versions are affected by CVE-2026-25369?
How do I fix CVE-2026-25369?
No fix has been published for CVE-2026-25369 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-2026-25369 being exploited?
There is no known exploitation of CVE-2026-25369 in the wild and no public exploit code.
Sources
Also known as GHSA-g23c-v634-9ffv.