Microsoft Clarity <= 0.9.3 - Cross-Site Request Forgery to Stored Cross-Site Scripting
Strategic Overview
- Status
- Patched in 0.9.4
- Affected Plugin
- Microsoft Clarity
- Affected Version
<= 0.9.3- CVSS
- 6.1Medium
- Weakness type
- CWE-352 · Cross-Site Request Forgery (CSRF)
- CVE
CVE-2024-0590
At a glance
CVE-2024-0590 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Microsoft Clarity WordPress plugin, affecting versions <= 0.9.3. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 0.9.4; sites on affected versions should update now. Disclosed February 2024, reported by GiongfNef.
Vulnerability Overview
The Microsoft Clarity plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 0.9.3. This is due to missing nonce validation on the edit_clarity_project_id() function. This makes it possible for unauthenticated attackers to change the project id and add malicious JavaScript via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.
CWE-352: Cross-Site Request Forgery (CSRF)
Microsoft Clarity <= 0.9.3 carries this weakness at edit_clarity_project_id(), and reaching it takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.
An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For Microsoft Clarity the fix is 0.9.4: builds <= 0.9.3 are affected, anything from 0.9.4 onward is not.
Remediation
Update to version 0.9.4, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Microsoft Clarity: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Microsoft Clarity 0.9.4 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Other vulnerabilities in Microsoft Clarity
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