CVE-2026-8489 Cross-site scripting in Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin
Authenticated attackers can inject arbitrary scripts via profile fields, leading to code execution when other users view the profile.
- 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-2026-8489?
CVE-2026-8489 is a medium-severity cross-site scripting vulnerability in ultimatemember Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin, published on 3 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'about_me' parameter in all versions up to, and including, 2.11.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Weakness: CWE-79
Which versions are affected by CVE-2026-8489?
How do I fix CVE-2026-8489?
No fix has been published for CVE-2026-8489 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-2026-8489 being exploited?
There is no known exploitation of CVE-2026-8489 in the wild and no public exploit code.
Sources
Also known as GHSA-whj4-pc5c-c7xq.