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CWE-640Weakness · CWE-640

CVE-2026-12417

CRITICAL · 9.8 CVSS v3.1 Published 2026-06-24
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

The SignUp & SignIn WordPress plugin's AJAX password change handler (`pravel_change_password`) accessible to unauthenticated users lacks nonce verification and capability checks. It performs a loose equality comparison between an attacker-supplied `reset_activation_code` and the target user's `forgot_email` meta value; for users who never initiated a password reset, this returns an empty string that trivially matches an empty attacker input, enabling unauthenticated password changes for any user including administrators.

MitigationUpdate the plugin to version 1.0.1 or later which addresses the missing nonce verification, capability checks, and implements proper password reset token validation. If no patch is available, disable the plugin immediately and audit for any signs of compromise.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify if SignUp & SignIn plugin is installed
    Check the WordPress plugins directory (wp-content/plugins/) for a folder named 'signup-signin' or similar, or query the wp_options table for the active_plugins entry. Inspect the plugin's main PHP file header for the Version comment.
    Affected if The plugin is present in the WordPress installation
  2. Determine the installed plugin version
    Open the plugin's main PHP file and locate the 'Version:' field in the plugin header comment. Compare this version number against the affected range (versions up to and including 1.0.0).
    Affected if The installed version is 1.0.0 or any earlier version
  3. Verify the vulnerable AJAX handler exists and is exposed
    Inspect the plugin source code for the function named 'pravel_change_password' and confirm it is hooked to 'wp_ajax_nopriv_pravel_change_password' or 'wp_ajax_nopriv_' actions. Optionally, send a POST request to /wp-admin/admin-ajax.php with action=pravel_change_password and observe if the endpoint responds.
    Affected if The handler is registered for unauthenticated access (wp_ajax_nopriv_ hook)
  4. Check user meta state for forgot_email
    Query the wp_usermeta table for rows where meta_key='forgot_email'. Users with an empty or missing forgot_email meta value are vulnerable to trivial bypass. Run: SELECT user_id, meta_value FROM wp_usermeta WHERE meta_key='forgot_email';
    Affected if Any user account has an empty or NULL forgot_email meta value (indicating no prior password reset was initiated)
  5. Review access logs for password change attempts
    Search web server access logs (Apache, Nginx) for POST requests to admin-ajax.php containing 'action=pravel_change_password'. Look for unusual patterns such as many requests to different user IDs in short succession.
    Affected if Suspicious POST requests to the vulnerable endpoint are present in logs

A WordPress site is affected if the SignUp & SignIn plugin (version 1.0.0 or below) is installed and the pravel_change_password AJAX handler is exposed to unauthenticated users, allowing attackers to reset any user password without a valid activation code.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update the plugin to version 1.0.1 or later which addresses the missing nonce verification, capability checks, and implements proper password reset token validation. If no patch is available, disable the plugin immediately and audit for any signs of compromise.

Recommended fix Moderate confidence

Latest version available in WordPress plugin repository (version higher than 1.0.0)

  1. 1. Check the current version of the SignUp & SignIn plugin installed on the WordPress site
  2. 2. Navigate to Plugins > Installed Plugins in the WordPress admin dashboard
  3. 3. Locate the SignUp & SignIn plugin and verify the installed version
  4. 4. If the installed version is 1.0.0 or below, update the plugin to the latest available version from the WordPress plugin repository
  5. 5. After updating, verify the new version is installed correctly
  6. 6. As a precautionary measure, reset passwords for administrator accounts that may have been targeted

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
15.0 hours of engineering $2,640
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-12417 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data