All in One SEO – Best WordPress SEO Plugin – Easily Improve SEO Rankings & Increase Traffic, CVE-2026-19856

CVE, Research URL: CVE-2026-19856
Home page URL: Security reports for All in One SEO – Best WordPress SEO Plugin – Easily Improve SEO Rankings & Increase Traffic
Application: All in One SEO – Best WordPress SEO Plugin – Easily Improve SEO Rankings & Increase Traffic
Published on: Oct 03, 2026
Research Description: The All in One SEO WordPress plugin before 5.0.2.1 does not correctly determine which shortcodes are present in content derived from user input before deciding which ones to strip, allowing unauthenticated users to execute arbitrary shortcodes registered on the site. On sites upgraded from older versions the protection is disabled outright, making the issue reachable without any crafted input.
Affected versions: max 5.0.2.1.
Status: vulnerable