CVE-2026-12417
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk36th percentile - higher than 36% of all known CVEs
Summary
The SignUp & SignIn plugin for WordPress up to version 1.0.0 contains a vulnerability allowing authentication bypass and account takeover. The issue is due to missing nonce verification, missing capability checks, and a loose equality check on the password reset code in the `pravel_change_password()` AJAX handler, enabling unauthenticated attackers to change any user's password, including administrators.
Risk Assessment
An attacker can take over an administrator account, gaining full control over the WordPress site, leading to privilege escalation and potential site compromise.
Recommendation
Immediately update the SignUp & SignIn plugin to the latest available version that fixes this vulnerability, or temporarily disable the plugin until a patch is released.
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Original NVD description (English source)
The SignUp & SignIn plugin for WordPress is vulnerable to Authentication Bypass via Weak Password Reset Validation leading to Account Takeover in versions up to, and including, 1.0.0. This is due to the `pravel_change_password()` AJAX handler — registered via `wp_ajax_nopriv_pravel_change_password` and therefore accessible to unauthenticated users — performing no nonce verification, no capability check, and only a loose equality check between an attacker-supplied `reset_activation_code` POST parameter and the target user's `forgot_email` user meta value; when a user has never initiated a password reset, `get_user_meta()` returns an empty string that trivially satisfies this check against an omitted or empty attacker-supplied code. This makes it possible for unauthenticated attackers to change the password of any WordPress user, including administrators, by sending a crafted POST request to `admin-ajax.php` with `action=pravel_change_password`, `reset_user_id` set to the target account's user ID, and `new_password_custom` set to an attacker-chosen password. Successful exploitation allows the attacker to authenticate with the newly set password and fully take over the targeted account, achieving administrator-level privilege escalation on the affected site.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

