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CVE-2025-9816

HighPublished

WP Statistics <= 14.5.4 - Unauthenticated Stored Cross-Site Scripting via User-Agent Header

Published: Sep 27, 2025
Updated: Apr 8, 2026
Assigning CNA: Wordfence
Evidence observed: Aug 8, 2026

Primary CVSS

7.2/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

9.7%

Low · next 30 days

Percentile: 95.3%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2025-9816PoC
Proof of Concept for Stored-XSS on Vulnerable WP-Statistics Plugin known as CVE-2025-9816

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