CVE-2026-9709 Themeco Cornerstone < 7.8.9 (Premium, bundled with X Theme) - Subscriber+ Arbitrary User Meta Disclosure
Authenticated users can access other users' metadata via an unprotected REST API route in the Cornerstone WordPress plugin.
- 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-2026-9709?
CVE-2026-9709 is a high-severity missing authorization vulnerability in Unknown Cornerstone, published on 24 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Cornerstone WordPress plugin before 7.8.9 does not enforce capability checks on one of its REST API routes, allowing any authenticated user to disclose the metadata of any other user, including roles, session token previews and stored billing/shipping fields. This affects the premium co Cornerstone page builder distributed bundled with the X , not the unrelated free `cornerstone` Cornerstone WordPress plugin before 7.8.9 (v0.8.x) on the .org repository.
Which versions are affected by CVE-2026-9709?
How do I fix CVE-2026-9709?
No fix has been published for CVE-2026-9709 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-9709 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9709 exists.
Sources
Also known as GHSA-c9vf-p6xc-gxq6.