{"id":"CVE-2021-33850","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-33850","generatedAt":"2026-10-27T23:43:28.672Z","title":"There is a Cross-Site Scripting vulnerability in Microsoft Clarity version 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.","published":"2021-11-19T16:15:08.000Z","lastModified":"2026-06-17T03:55:19.000Z","status":"Modified","sourceIdentifier":"disclose@cybersecurityworks.com","cvss":{"version":"3.1","score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"},"cwe":["CWE-79"],"affected":["microsoft/clarity"],"epss":{"score":0.01598,"percentile":0.75596,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.60%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://cybersecurityworks.com/zerodays/cve-2021-33850-stored-cross-site-scripting-xss-in-wordpress-microsoft-clarity-plugin.html","tags":["Exploit","Third Party Advisory"],"source":"disclose@cybersecurityworks.com"},{"url":"https://cybersecurityworks.com/zerodays/cve-2021-33850-stored-cross-site-scripting-xss-in-wordpress-microsoft-clarity-plugin.html","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-33850","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}