CVE-2019-16520: Semperplugins All In One Seo Pack

Medium severity, CVSS 5.4. EPSS: 1.5% chance of exploitation in the next 30 days.

The all-in-one-seo-pack plugin before 3.2.7 for WordPress (aka All in One SEO Pack) is susceptible to Stored XSS due to improper encoding of the SEO-specific description for posts provided by the plugin via unsafe placeholder replacement.

Affected products

• Semperplugins All In One Seo Pack: before 3.2.7 (fixed in 3.2.7)

Published 2019-10-16. Last modified 2026-06-17.