Overview On July 17, 2026, a GitHub Security Advisory was published for CVE-2026-63030 , a critical unauthenticated remote code execution vulnerability affecting WordPress Core . While the official GitHub security advisory classifies the severity as Critical, the vulnerability has currently been assigned a CVSS score of 7.5. WordPress is one of the most widely deployed content management systems, making vulnerabilities in its core software potentially significant for organizations operating public-facing websites.