CVE-2021-33850 Cross-site scripting in Microsoft Clarity
Attackers can inject malicious scripts into Microsoft Clarity configuration pages, potentially executing code in victim browsers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-33850?
CVE-2021-33850 is a medium-severity cross-site scripting vulnerability in Microsoft Clarity, published on 19 Nov 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2021-33850?
It affects 1 product.
Products include Microsoft Clarity.
How do I fix CVE-2021-33850?
No fix has been published for CVE-2021-33850 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-33850 being exploited?
There is no known exploitation of CVE-2021-33850 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Clarity
Sources
Also known as GHSA-966j-fwrw-4gxw.