CVE-2026-15780
HighCVSS 7.2Exploitation Probability (EPSS)
Low risk33th percentile - higher than 33% of all known CVEs
Summary
The WP Statistics plugin for WordPress up to version 14.16.8 is vulnerable to Stored Cross-Site Scripting via the 'utm_campaign' parameter due to insufficient input sanitization and output escaping. Unauthenticated attackers can inject arbitrary web scripts that execute when a user accesses an injected page. The attack can be performed without authentication via the public /wp-statistics/v2/hit REST endpoint.
Risk Assessment
The risk includes malicious script execution in users' browsers, which can lead to data theft, session hijacking, or further attacks.
Recommendation
Update the WP Statistics plugin to the latest version that includes the fix. Additionally, restrict access to public REST endpoints or apply additional validation mechanisms.
Original NVD description (English source)
The WP Statistics – Simple, privacy-friendly Google Analytics alternative plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'utm_campaign' parameter in all versions up to, and including, 14.16.8 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 payload can be planted without authentication via the public /wp-statistics/v2/hit REST endpoint, because the required signature is exposed on the public homepage and a base64-encoded page_uri POST parameter overrides the previously sanitized REQUEST_URI, allowing the malicious utm_campaign value to bypass sanitization and be stored in the database.