Overview
The Stop User Enumeration plugin for WordPress, a tool designed to shield your website’s user data from prying eyes, has been found to have a significant security flaw. This vulnerability, officially labeled CVE-2025-4302, creates an unexpected loophole, allowing malicious actors to bypass the plugin’s intended protection. In simple terms, while the plugin is supposed to stop unauthorized users from accessing a list of your website’s users via the REST API, a clever trick involving URL-encoding the API path renders this defense ineffective. This means that despite the plugin’s presence, an attacker could still potentially gather usernames and other details, making your WordPress site more susceptible to various follow-up attacks, such as brute-force attempts on login pages. This issue has been classified with a medium severity rating, emphasizing the need for prompt action to secure your site.
CVE Details
- Product: Stop User Enumeration WordPress Plugin
- Published: June 26, 2025
- Severity: Medium
- Status: Analyzed
Affected Products
If you are using the Stop User Enumeration WordPress plugin, it’s crucial to check its version. All versions of this plugin prior to 1.7.3 are susceptible to this protection bypass vulnerability. This means that any WordPress site utilizing an outdated version of this plugin is currently at risk of having its user information exposed.
Current Status
The cybersecurity community has thoroughly analyzed and confirmed this vulnerability. The good news is that while the flaw exists and its bypass method is known, the developers of the Stop User Enumeration plugin have released an update to address it. This means the path to securing your site is clear and readily available.
Severity Level
With a CVSS (Common Vulnerability Scoring System) score of 5.3, this vulnerability is considered to be of ‘Medium’ severity. While it doesn’t typically allow for direct control over your website or immediate data corruption, the exposure of user accounts can provide attackers with valuable intelligence. This information can then be used to craft more sophisticated phishing attacks, carry out targeted credential stuffing, or facilitate brute-force attacks against user login credentials, ultimately compromising your site’s security and user privacy.
Possible Solutions
Protecting your WordPress website from this vulnerability is straightforward and essential. The most effective and immediate solution is to update your Stop User Enumeration plugin to version 1.7.3 or any later version that becomes available. Plugin developers release these updates specifically to patch security holes and improve overall system resilience. Regularly checking for and applying updates for all your WordPress themes, plugins, and the core WordPress software is a fundamental practice in maintaining a secure online presence. If for some reason you cannot update immediately, consider temporarily deactivating the plugin until an update can be performed. Always backup your website before performing any updates.
References
https://wpscan.com/vulnerability/19f67d6e-4ffe-4126-ac42-fb23c5017a3e
