CVE-2026-86814

The UsersWP plugin for WordPress is vulnerable to unauthorized account access via Use of Predictable Password in versions up to 1.2.78. The vulnerability exists because get_dummy_user_passowrd() derives the shared password for all 25 built-in dummy user accounts as the first 15 characters of substr(hash('SHA256', AUTH_KEY . site_url()), 0, 25), while the full 25-character value of that same hash is simultaneously embedded in the hidden 'uwp_register_hash' field rendered on every registration form response — reachable without authentication via both the public /register/ page and the wp_ajax_nopriv_uwp_ajax_register_form AJAX handler, even when user registration is disabled. This makes it possible for unauthenticated attackers to recover the dummy user password directly from a single HTTP request and use it to authenticate as any of the 25 built-in dummy accounts (such as antawn, chynna, or kiki) through wp-login.php, potentially achieving privilege escalation if any dummy account holds an elevated role. Exploitation requires that an administrator has previously created dummy users via the plugin's Tools page.

The UsersWP plugin for WordPress (up to version 1.2.73) is vulnerable to Reflected XSS due to improper neutralization of input during web page generation. An attacker can inject a malicious script that is reflected and executed in the user's browser.

The UsersWP plugin for WordPress up to version 1.2.74 contains a Missing Authorization vulnerability caused by incorrectly configured access control security levels. This allows exploitation of improperly configured access control.

The UsersWP plugin for WordPress (versions up to and including 1.2.70) is vulnerable to Arbitrary File Deletion via the upload_file_remove() AJAX handler. An authenticated attacker with Subscriber-level access or above can delete arbitrary files on the server, including wp-config.

The UsersWP – Front-end login form, User Registration, User Profile & Members Directory plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Badge Widget Variable Substitution in all versions up to and including 1.2.69 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The UsersWP plugin for WordPress up to version 1.2.65 is vulnerable to arbitrary file deletion. This is due to insufficient validation of file fields in the UsersWP_Validation::validate_fields() function and lack of path canonicalization in the UsersWP_Forms::upload_file_remove() AJAX handler, allowing deletion of any file on the server.

The UsersWP plugin (versions up to and including 1.2.48) contains a Cross-Site Request Forgery (CSRF) vulnerability. It allows an attacker to force an administrator to perform unwanted actions.

The UsersWP (userswp) plugin up to version 1.2.47 has a missing authorization vulnerability, allowing exploitation of incorrectly configured access control security levels.