CVE-2026-8181: Burst Statistics 3.4.0 - 3.4.1.1 - Authentication Bypass to Admin Account Takeover
Vulnerability summary
CVE-2026-8181 is a critical (CVSS 9.8) Improper Authentication vulnerability in burstbv burst statistics – privacy-friendly wordpress analytics (google analytics alternative). EPSS estimates a 3.01% chance of exploitation in the next 30 days, higher than 87.3% of scored vulnerabilities.
Timeline
- 14-05-2026PublishedVulnerability first disclosed.
- 14-05-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
3 scores · 3 sources · 1 version- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- wordfenceSource9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
3.01%
Chance of exploitation in the next 30 days
Percentile
87%
Versus all other CVEs
30-day change
Decrease -11.60 pp
From 14.61% on 22-09-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Burstbv1 product
Wordpress1 product
- burst-statistics≥ 3.4.0, ≤ 3.4.1.1 (fixed in 3.4.2)
2 vendors · 2 products