Burst Statistics 3.4.0 - 3.4.1.1 - Authentication Bypass to Admin Account Takeover

Summary

The Burst Statistics – Privacy-Friendly WordPress Analytics (Google Analytics Alternative) plugin for WordPress is vulnerable to Authentication Bypass in versions 3.4.0 to 3.4.1.1. This is due to incorrect return-value handling in the `is_mainwp_authenticated()` function when validating application passwords from the Authorization header. This makes it possible for unauthenticated attackers, with knowledge of an administrator username, to impersonate that administrator for the duration of the request by supplying any random Basic Authentication password achieving privilege escalation.

Timeline

1. May 14, 2026, 5:30 AM UTCCVE published
2. May 14, 2026, 10:38 AM UTCCISA SSVC assessment

   Exploitation: none · Automatable: yes · Technical impact: total

3. May 14, 2026, 10:46 AM UTCRecord last updated
4. Oct 28, 2026EPSS reached 10%

   FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

• burstbv Burst Statistics – Privacy-Friendly WordPress Analytics (Google Analytics Alternative)

  From 3.4.0 · through 3.4.1.1

References 23