Unknown Ultimate Multisite vulnerabilities

2 CVEs affecting Unknown Ultimate Multisite, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-107508, published 2026-10-14.

Highest priority

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

CVE-2026-107508, published 2026-10-14. High severity, CVSS 8.6. EPSS: 0.5% chance of exploitation in the next 30 days. The Ultimate Multisite WordPress plugin before 2.17.2 does not validate a user-supplied value used to select a file to include, allowing unauthenticated attackers to include and read arbitrary local…
CVE-2026-103646, published 2026-10-08. Critical severity, CVSS 9.8. EPSS: 0.4% chance of exploitation in the next 30 days. The Ultimate Multisite WordPress plugin before 2.17.0 does not require authentication before a logged-out checkout is linked to, and logged in as, an existing WordPress account matching the…