Unknown Cornerstone vulnerabilities

2 CVEs affecting Unknown Cornerstone, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-9710, published 2026-06-24.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2026-9710, published 2026-06-24. High severity, CVSS 7.7. EPSS: 0.4% chance of exploitation in the next 30 days. The Cornerstone WordPress plugin before 7.8.8 does not enforce capability checks on one of its CSS-preview request handlers, and exposes the nonce needed to call it to every logged-in user on any…
• CVE-2026-9709, published 2026-06-24. High severity, CVSS 7.7. EPSS: 0.4% chance of exploitation in the next 30 days. 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…