Banhammer – Monitor Site Traffic, Block Bad Users and Bots <= 3.4.8 - Unauthenticated Protection Mechanism Bypass
The Banhammer – Monitor Site Traffic, Block Bad Users and Bots plugin for WordPress is vulnerable to Blocking Bypass in all versions up to, and including, 3.4.8. This is due to a site-wide “secret key” being deterministically generated from a constant character set using md5() and base64_encode() and then stored in the banhammer_secret_key option. This makes it possible for unauthenticated attackers to bypass the plugin’s logging and blocking by appending a GET parameter named banhammer-process_{SECRET} where {SECRET} is the predictable value, thereby causing Banhammer to abort its protections for that request.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | Banhammer – Monitor Site Traffic, Block Bad Users and Bots | <= 3.4.8 | 3.4.9 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N- Weakness (CWE)
CWE-330- Platform
- WordPress
- Package
Banhammer – Monitor Site Traffic, Block Bad Users and Bots- Disclosed
- 25.09.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
Wordfence Intelligence - 97c46a13-6981-426f-b24a-c9820657042f - Wordfence Intelligence
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Vulnerability history: Banhammer – Monitor Site Traffic, Block Bad Users and Bots
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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