Overview
This blog post presents a detailed review of a critical cybersecurity vulnerability identified as CVE-2025-6187. This vulnerability affects the bSecure plugin for WordPress, a popular platform used by millions of websites worldwide. The vulnerability lies in the plugin’s ability to handle user privileges, enabling unauthorized users to escalate their privileges. Because of the prevalence of WordPress and the wide adoption of the bSecure plugin, this vulnerability could potentially affect a significant number of websites, making it a critical concern for web administrators, developers, and cybersecurity professionals.
Vulnerability Summary
CVE ID: CVE-2025-6187
Severity: Critical (9.8 CVSS score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage
Affected Products
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Product | Affected Versions
bSecure Plugin for WordPress | 1.3.7 to 1.7.9
How the Exploit Works
The exploit takes advantage of a weakness in the bSecure plugin’s order_info REST endpoint. The plugin registers the /webhook/v2/order_info/ route with a permission_callback that always returns true. This faulty implementation effectively bypasses all authentication processes. An unauthenticated attacker who knows any user’s email can exploit this vulnerability to obtain a valid login cookie and fully impersonate that account.
Conceptual Example Code
Below is a conceptual example of how the vulnerability might be exploited using an HTTP request:
POST /webhook/v2/order_info/ HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"user_email": "victim@example.com",
"action": "get_login_cookie"
}In this example, the attacker sends a POST request to the vulnerable endpoint, providing the email of the user they wish to impersonate. The server, due to the faulty implementation, will return a valid login cookie for that user, allowing the attacker to impersonate the user.
Mitigation Guidance
The most effective way to mitigate this vulnerability is by applying the vendor-provided patch. This patch should fix the issue within the bSecure plugin that leads to the potential privilege escalation. If the patch is not immediately available, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can help to detect and block attempts to exploit this vulnerability as a temporary solution. It is also advised to always keep all software, including WordPress and all its plugins, up-to-date to prevent exposure to known vulnerabilities.