What is CVE-2026-9709?

CVE-2026-9709 is a high-severity vulnerability in Cornerstone, classified under CWE-200 INFORMATION EXPOSURE. CVSS score: 7.7/10. Published 2026-06-24.

How severe is CVE-2026-9709?

High severity. CVSS v3 base score is 7.7 out of 10.

Vulnerability in Cornerstone

CVE-2026-9709

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…

EPSS: 0.001 (3.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

Affected products

Unknown Cornerstone — versions 3.0.0

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-9709?: CVE-2026-9709 is a high-severity vulnerability in Cornerstone, classified under CWE-200 INFORMATION EXPOSURE. CVSS score: 7.7/10. Published 2026-06-24.
How severe is CVE-2026-9709?: High severity. CVSS v3 base score is 7.7 out of 10.