VulnerabilityModified
CVE-2021-33850
There is a Cross-Site Scripting vulnerability in Microsoft Clarity version 0.3.
MEDIUM 5.4EPSS 1.60%
Does this matter?
Lower severity and a low EPSS score (1.60%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 1.60% probability · 76th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- microsoft/clarity
- Source
- disclose@cybersecurityworks.com
EPSS 1.6% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://cybersecurityworks.com/zerodays/cve-2021-33850-stored-cross-site-scripting-xss-in-wordpress-microsoft-clarity-plugin.htmlExploit, Third Party Advisory
- https://cybersecurityworks.com/zerodays/cve-2021-33850-stored-cross-site-scripting-xss-in-wordpress-microsoft-clarity-plugin.htmlExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.