The User Registration plugin for WordPress is vulnerable to Sensitive Information Exposure due to hardcoded encryption key on the 'lock_content_form_handler' and 'display_password_form' function in versions up to, and including, 3.7.3. This makes it possible for unauthenticated attackers to decrypt and view the password protected content.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-3371
• https://plugins.trac.wordpress.org/browser/embedpress/tags/3.7.3/EmbedPress/Includes/Classes/Helper.php#L231
• https://plugins.trac.wordpress.org/browser/embedpress/tags/3.7.3/EmbedPress/Includes/Classes/Helper.php#L278
• https://plugins.trac.wordpress.org/browser/embedpress/tags/3.7.3/Gutenberg/block-backend/block-embedpress.php#L30
• https://plugins.trac.wordpress.org/changeset/2930523/embedpress#file10
• https://plugins.trac.wordpress.org/changeset/2930523/embedpress#file28
• https://www.wordfence.com/threat-intel/vulnerabilities/id/c1033b4d-82a0-4484-aebf-f35d6a2a9a13?source=cve