XSS in Microsoft Clarity
CVE-2021-33850
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.016 (74.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.016 · change: +0.001
Affected products
- Microsoft Clarity — versions 0.3
- Microsoft Clarity — versions 0.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cybersecurityworks.com/zerodays/cve-2021-33850-stored-cross-site-scripting-xss-… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-33850?
- CVE-2021-33850 is a medium-severity vulnerability in Microsoft Clarity, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-11-19.
- How severe is CVE-2021-33850?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2021-33850 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.