CVE-2021-24817: Ultimate Nofollow Project Ultimate Nofollow

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

The Ultimate NoFollow WordPress plugin through 1.4.8 does not sanitise and escape the href attribute of its shortcodes, allowing users with a role as low as contributor to perform Cross-Site Scripting attacks

Affected products

• Ultimate Nofollow Project Ultimate Nofollow: up to and including 1.4.8

Published 2021-12-13. Last modified 2026-06-17.