CVE-2024-0590Network attack vector

Stored XSS via nonce-free project ID update

Published Feb 20, 2024 · Updated Apr 8, 2026

CSRF in Microsoft Clarity for WordPress 0.9.3 and earlier allows remote attackers to inject stored JavaScript through a forged request. The edit_clarity_project_id() function updates the stored Clarity project ID from request data without validating a WordPress nonce, allowing attacker-supplied script content to persist. Exploitation requires a logged-in site administrator to follow or submit the forged request, after which the stored script can execute in the site's origin.

CVSS severity6.1
Medium
EPSS probability1.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in Microsoft Clarity for WordPress 0.9.3 and earlier allows remote attackers to inject stored JavaScript through a forged request. The edit_clarity_project_id() function updates the stored Clarity project ID from request data without validating a WordPress nonce, allowing attacker-supplied script content to persist. Exploitation requires a logged-in site administrator to follow or submit the forged request, after which the stored script can execute in the site's origin.

The record

CVE
CVE-2024-0590
Published
Feb 20, 2024
Updated
Apr 8, 2026
Vendor
Microsoft
Product
Microsoft Clarity
Classifications
CWE-352, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 20, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=0.9.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Clarityversion=0 <=0.9.3

Published CVSS scores

6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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