CVE-2026-15780 WP Statistics <= 14.16.8 - Unauthenticated Stored Cross-Site Scripting via 'utm_campaign' Parameter

Q: What is CVE-2026-15780?

CVE-2026-15780 is a high-severity cross-site scripting vulnerability in veronalabs WP Statistics – Simple, privacy-friendly Google Analytics alternative, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Q: Is CVE-2026-15780 being exploited?

There is no known exploitation of CVE-2026-15780 in the wild and no public exploit code.

Q: How do I fix CVE-2026-15780?

No fix has been published for CVE-2026-15780 yet. Limit exposure of the affected software until one is available.

High 7.2 Published 19 Aug 2026 Updated 19 Aug 2026

Unauthenticated attackers can inject arbitrary scripts via the utm_campaign parameter, leading to stored XSS and potential account takeover.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-15780?

CVE-2026-15780 is a high-severity cross-site scripting vulnerability in veronalabs WP Statistics – Simple, privacy-friendly Google Analytics alternative, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-79

Which versions are affected by CVE-2026-15780?

How do I fix CVE-2026-15780?

No fix has been published for CVE-2026-15780 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-15780 being exploited?