CVE-2021-37417: Zohocorp ManageEngine Adselfservice Plus

Critical severity, CVSS 9.8. EPSS: 4.8% chance of exploitation in the next 30 days.

Zoho ManageEngine ADSelfService Plus version 6103 and prior allows CAPTCHA bypass due to improper parameter validation.

Affected products

• Zohocorp ManageEngine Adselfservice Plus: before 6.1 (fixed in 6.1); version 6.1 only

Published 2021-08-30. Last modified 2026-06-17.