CVE-2021-36830: Comment Guestbook Project Comment Guestbook

Medium severity, CVSS 4.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Authenticated (admin+) Stored Cross-Site Scripting (XSS) vulnerability in Comment Guestbook plugin <= 0.8.0 at WordPress.

Affected products

• Comment Guestbook Project Comment Guestbook: up to and including 0.8.0

Published 2022-09-30. Last modified 2026-06-17.