CVE-2025-9816: WP Statistics <= 14.5.4 - Unauthenticated Stored Cross-Site Scripting via User-Agent Header

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 10.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-09-27 · updated 2026-10-09
Weakness: CWE-79

Description

The WP Statistics – The Most Popular Privacy-Friendly Analytics Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the User-Agent Header in all versions up to, and including, 14.5.4 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.

Affected products

WP Statistics: through 14.15.4

References

https://plugins.trac.wordpress.org/browser/wp-statistics/tags/14.15.3/includes/admin/templates/pages/devices/models.php#L31
https://www.wordfence.com/threat-intel/vulnerabilities/id/d8351204-da6d-443a-98b5-0608bfb1e9d0?source=cve

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