Banhammer – Monitor Site Traffic, Block Bad Users and Bots <= 3.4.8 - Unauthenticated Protection Mechanism Bypass

Wordfence Intelligence   >   Vulnerability Database   >   Banhammer – Monitor Site Traffic, Block Bad Users and Bots <= 3.4.8 - Unauthenticated Protection Mechanism Bypass
5.3
Use of Insufficiently Random Values
CVE CVE-2025-10745
CVSS 5.3 (Medium)
Publicly Published September 25, 2025
Last Updated September 26, 2025
Researcher Jonas Benjamin Friedli

Description

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.

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Vulnerability Details for Banhammer – Monitor Site Traffic, Block Bad Users and Bots

Banhammer – Monitor Site Traffic, Block Bad Users and Bots

Software Type Plugin
Software Slug banhammer (view on wordpress.org)
Patched? Yes
Remediation Update to version 3.4.9, or a newer patched version
Affected Version
  • <= 3.4.8
Patched Version
  • 3.4.9

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