CVE-2021-33850: Microsoft Clarity

Medium severity, CVSS 5.4. EPSS: 1.6% chance of exploitation in the next 30 days.

There is a Cross-Site Scripting vulnerability in Microsoft Clarity version 0.3. The XSS payload executes whenever the user changes the clarity configuration in Microsoft Clarity version 0.3. The payload is stored on the configuring project Id page.

Affected products

• Microsoft Clarity: version 0.3 only

Published 2021-11-19. Last modified 2026-06-17.