CVE-2026-11766 Ultimate Member < 2.12.0 - Subscriber+ Stored XSS via Custom Textarea Profile Fields
Authenticated users can inject JavaScript into profile fields, leading to code execution or account takeover when administrators view the profile.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-11766?
CVE-2026-11766 is a high-severity cross-site scripting vulnerability in Unknown Ultimate Member, published on 6 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
The Ultimate Member WordPress plugin before 2.12.0 does not properly sanitise and escape the value of custom textarea profile fields before outputting it on user profiles, allowing authenticated users with Subscriber-level access and above to store JavaScript that executes when any user, including an administrator, views the affected profile.
Which versions are affected by CVE-2026-11766?
How do I fix CVE-2026-11766?
No fix has been published for CVE-2026-11766 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-2026-11766 being exploited?
There is no known exploitation of CVE-2026-11766 in the wild and no public exploit code.
Sources
Also known as GHSA-qhrq-pqx6-6f9v.