CVE-2026-8181: Authentication Bypass in Burst Statistics Plugin
Platform
wordpress
Component
burst-statistics
Fixed in
3.4.2
CVE-2026-8181 represents a critical Authentication Bypass vulnerability affecting the Burst Statistics – Privacy-Friendly WordPress Analytics plugin. An attacker can leverage this flaw to impersonate WordPress administrators, potentially gaining full control over the website. This vulnerability impacts versions 3.4.0 through 3.4.1.1, and a patch is available in version 3.4.2.
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Impact and Attack Scenarios
The impact of this vulnerability is severe. An unauthenticated attacker, possessing a valid administrator username, can bypass authentication by providing any arbitrary Basic Authentication password. This allows them to execute actions as that administrator for the duration of the request, including modifying website content, installing malicious plugins, accessing sensitive data, and potentially compromising the entire WordPress installation. The ease of exploitation, requiring only a username and a random password, significantly increases the risk of widespread attacks targeting sites running vulnerable versions of the plugin. This is similar to other Basic Authentication bypasses where improper validation allows unauthorized access.
Exploitation Context
CVE-2026-8181 was published on 2026-05-13. Its CVSS score of 9.8 (CRITICAL) indicates a high probability of exploitation. Public proof-of-concept (POC) code is likely to emerge, further increasing the risk. The vulnerability is not currently listed on KEV or EPSS, but the critical severity warrants immediate attention. Monitor security advisories and WordPress vulnerability databases for updates.
Threat Intelligence
Exploit Status
CVSS Vector
What do these metrics mean?
- Attack Vector
- Network — remotely exploitable over the internet. No physical or local access required. Widest attack surface.
- Attack Complexity
- Low — no special conditions required. Attacker can exploit reliably without depending on rare configurations or timing.
- Privileges Required
- None — unauthenticated. No login or credentials needed to exploit.
- User Interaction
- None — attack is automatic and silent. Victim does nothing: no click, no file open.
- Scope
- Unchanged — impact is limited to the vulnerable component itself.
- Confidentiality
- High — complete confidentiality loss. Attacker can read all data: credentials, keys, personal data.
- Integrity
- High — attacker can write, modify, or delete any data: databases, config files, or code.
- Availability
- High — complete crash or resource exhaustion. Full denial of service.
Affected Software
Weakness Classification (CWE)
Timeline
- Published
Mitigation and Workarounds
The primary mitigation is to immediately upgrade the Burst Statistics plugin to version 3.4.2 or later. If upgrading is not immediately feasible due to compatibility issues or breaking changes, consider temporarily disabling the plugin to prevent exploitation. While not a complete solution, implementing a Web Application Firewall (WAF) with rules to block suspicious Basic Authentication attempts can provide an additional layer of defense. Regularly review WordPress user accounts and permissions to ensure only authorized users have administrative access.
How to fix
Update to version 3.4.2, or a newer patched version
Frequently asked questions
What is CVE-2026-8181 — Authentication Bypass in Burst Statistics Plugin?
CVE-2026-8181 is a critical vulnerability in the Burst Statistics WordPress plugin allowing unauthenticated attackers to impersonate administrators by providing random Basic Authentication passwords, leading to privilege escalation.
Am I affected by CVE-2026-8181 in Burst Statistics Plugin?
You are affected if your WordPress site uses the Burst Statistics plugin versions 3.4.0 through 3.4.1.1. Check your plugin version immediately using wp plugin list.
How do I fix CVE-2026-8181 in Burst Statistics Plugin?
Upgrade the Burst Statistics plugin to version 3.4.2 or later. If immediate upgrade isn't possible, temporarily disable the plugin and consider WAF rules to block suspicious Basic Auth attempts.
Is CVE-2026-8181 being actively exploited?
While there are no confirmed reports of active exploitation at this time, the critical severity and ease of exploitation suggest a high likelihood of exploitation in the near future.
Where can I find the official Burst Statistics advisory for CVE-2026-8181?
Refer to the official Burst Statistics plugin website and WordPress.org plugin repository for the latest security advisory and update information regarding CVE-2026-8181.
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