Overview
In the cybersecurity landscape, vulnerabilities are a constant threat that need to be identified and mitigated. One such vulnerability, CVE-2025-5190, affects the Browse As plugin for WordPress. WordPress, being a widely used CMS (Content Management System), makes this vulnerability particularly significant.
The flaw is due to incorrect authentication checking in a specific function of the plugin, which potentially allows an authenticated attacker, with subscriber-level permissions, to log in as any user, including administrators. This can lead to serious consequences such as system compromise or data leakage.
Vulnerability Summary
CVE ID: CVE-2025-5190
Severity: High (CVSS Score: 8.8)
Attack Vector: Network
Privileges Required: Low (Subscriber-level permissions)
User Interaction: Required
Impact: System compromise, data leakage
Affected Products
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Product | Affected Versions
WordPress Browse As Plugin | Up to and including 0.2
How the Exploit Works
The exploit leverages a flaw in the ‘IS_BA_Browse_As::notice’ function of the Browse As plugin. This function incorrectly checks the ‘is_ba_original_user_COOKIEHASH’ cookie value for authentication. As a result, an authenticated attacker with subscriber-level permissions can manipulate this cookie value to bypass the authentication process and gain access as any existing user on the WordPress site.
Conceptual Example Code
Here is a conceptual example of how the vulnerability might be exploited. The attacker manipulates the ‘is_ba_original_user_COOKIEHASH’ cookie value in an HTTP request to the server:
GET /wp-admin HTTP/1.1
Host: vulnerablewebsite.com
Cookie: is_ba_original_user_COOKIEHASH=[Manipulated Value]In the above example, `[Manipulated Value]` is the manipulated cookie value that allows the attacker to bypass authentication and assume the identity of any existing user on the site.
Mitigation and Prevention
To mitigate this vulnerability, users of the Browse As plugin for WordPress should apply the vendor’s patch immediately. In the absence of a patch or until the patch can be applied, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as temporary mitigation.
Remember, staying updated with the latest patches and security best practices is the best way to protect your systems from vulnerabilities like CVE-2025-5190.