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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.

PUBLISHED Reserved 2026-05-01 | Published 2026-05-28 | Updated 2026-05-28 | Assigner Wordfence




HIGH: 7.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status
unaffected

Any version
affected

Timeline

2026-05-01:Vendor Notified
2026-05-27:Disclosed

Credits

Supakiad S. finder

References

www.wordfence.com/...-7fe3-4033-993c-3c8dba0f216d?source=cve

plugins.trac.wordpress.org/...n/view/wp-slimstat-reports.php

plugins.trac.wordpress.org/...n/view/wp-slimstat-reports.php

plugins.trac.wordpress.org/.../trunk/src/Tracker/Storage.php

plugins.trac.wordpress.org/...5.4.11/src/Tracker/Storage.php

plugins.trac.wordpress.org/...runk/src/Tracker/Processor.php

plugins.trac.wordpress.org/...4.11/src/Tracker/Processor.php

plugins.trac.wordpress.org/...runk/src/Services/Browscap.php

plugins.trac.wordpress.org/...4.11/src/Services/Browscap.php

plugins.trac.wordpress.org/...n/view/wp-slimstat-reports.php

plugins.trac.wordpress.org/.../5.4.4/src/Tracker/Storage.php

plugins.trac.wordpress.org/....4.4/src/Tracker/Processor.php

plugins.trac.wordpress.org/....4.4/src/Services/Browscap.php

github.com/wp-slimstat/wp-slimstat/pull/297

cve.org (CVE-2026-7634)

nvd.nist.gov (CVE-2026-7634)

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