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Vulnerability record · CVE-2026-7634 · published 28 May 2026

CVE-2026-7634: Cross-site scripting vulnerability

The SlimStat Analytics plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'User-Agent' header in all versions up to, and including, 5.4.11 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The show_complete_user_agent_tooltip setting must be explicitly enabled by an administrator (disabled by default) for the stored payload to be rendered and executed.

7.2 CVSS 3.1 High EPSS 0.53% · top 57.7% CWE-79 · Cross-site scripting Deferred
7.2CVSS 3.1 base score
0.53%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

Description

The SlimStat Analytics plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'User-Agent' header in all versions up to, and including, 5.4.11 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The show_complete_user_agent_tooltip setting must be explicitly enabled by an administrator (disabled by default) for the stored payload to be rendered and executed.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References

LinkTags
https://github.com/wp-slimstat/wp-slimstat/pull/297
https://plugins.trac.wordpress.org/browser/wp-slimstat/tags/5.4.11/admin/view/wp-slimstat-reports.php#L2099
https://plugins.trac.wordpress.org/browser/wp-slimstat/tags/5.4.11/src/Services/Browscap.php#L270
https://plugins.trac.wordpress.org/browser/wp-slimstat/tags/5.4.11/src/Tracker/Processor.php#L776
https://plugins.trac.wordpress.org/browser/wp-slimstat/tags/5.4.11/src/Tracker/Storage.php#L25
https://plugins.trac.wordpress.org/browser/wp-slimstat/tags/5.4.4/admin/view/wp-slimstat-reports.php#L2099
https://plugins.trac.wordpress.org/browser/wp-slimstat/tags/5.4.4/src/Services/Browscap.php#L270
https://plugins.trac.wordpress.org/browser/wp-slimstat/tags/5.4.4/src/Tracker/Processor.php#L776
https://plugins.trac.wordpress.org/browser/wp-slimstat/tags/5.4.4/src/Tracker/Storage.php#L25
https://plugins.trac.wordpress.org/browser/wp-slimstat/trunk/admin/view/wp-slimstat-reports.php#L2099
https://plugins.trac.wordpress.org/browser/wp-slimstat/trunk/src/Services/Browscap.php#L270
https://plugins.trac.wordpress.org/browser/wp-slimstat/trunk/src/Tracker/Processor.php#L776
https://plugins.trac.wordpress.org/browser/wp-slimstat/trunk/src/Tracker/Storage.php#L25
https://www.wordfence.com/threat-intel/vulnerabilities/id/0a309bf8-7fe3-4033-993c-3c8dba0f216d?source=cve

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Source: NIST National Vulnerability Database (record CVE-2026-7634), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.