CVE-2026-49764 Overview
CVE-2026-49764 is an unauthenticated broken authentication vulnerability affecting the RegistrationMagic WordPress plugin in versions up to and including 6.0.8.6. The flaw is classified under CWE-288 (Authentication Bypass Using an Alternate Path or Channel). Remote attackers can abuse the authentication logic without credentials or user interaction, gaining unauthorized access to protected functionality. The plugin, distributed as custom-registration-form-builder-with-submission-manager, is widely deployed on WordPress sites for user registration workflows. Successful exploitation impacts confidentiality, integrity, and availability of the affected site.
Critical Impact
Unauthenticated attackers can bypass authentication on WordPress sites running RegistrationMagic <= 6.0.8.6, leading to unauthorized account access and full site compromise.
Affected Products
- RegistrationMagic WordPress plugin (custom-registration-form-builder-with-submission-manager)
- All versions up to and including 6.0.8.6
- WordPress sites using RegistrationMagic for user registration and submission management
Discovery Timeline
- 2026-06-15 - CVE-2026-49764 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-49764
Vulnerability Analysis
The vulnerability resides in the authentication logic of the RegistrationMagic plugin. Attackers reach the affected code path over the network without authentication or user interaction. The flaw maps to [CWE-288], which describes scenarios where an alternate channel bypasses the primary authentication mechanism. Exploitation grants attackers access to functionality normally restricted to authenticated users, including potentially privileged registration and submission management operations. The Exploit Prediction Scoring System rates this issue in the 31.7 percentile, with no public exploit yet observed in the wild.
Root Cause
The plugin exposes an authentication path that does not enforce identity verification before granting access to protected resources. Code paths intended for authenticated users can be reached through an alternate route that skips credential validation. This pattern is characteristic of [CWE-288] weaknesses, where developers rely on assumed entry points rather than centralized authentication checks. Refer to the Patchstack Vulnerability Report for additional technical context.
Attack Vector
The attack is remotely exploitable over the network. An attacker sends a crafted HTTP request to a vulnerable RegistrationMagic endpoint on the target WordPress site. No credentials, tokens, or user interaction are required. Once authentication is bypassed, the attacker can interact with protected plugin functionality, potentially escalating to account takeover or content manipulation depending on plugin configuration.
No verified proof-of-concept code is publicly available. See the Patchstack Vulnerability Report for vendor-provided details.
Detection Methods for CVE-2026-49764
Indicators of Compromise
- Unexpected HTTP POST or GET requests to RegistrationMagic plugin endpoints under /wp-content/plugins/custom-registration-form-builder-with-submission-manager/
- New WordPress user accounts created without corresponding registration form submissions in plugin logs
- Access to admin-only RegistrationMagic actions from unauthenticated sessions in web server logs
- Anomalous session creation events not tied to a valid login flow
Detection Strategies
- Inspect WordPress access logs for requests targeting RegistrationMagic AJAX or REST endpoints from external IP addresses without prior login activity.
- Audit the wp_users and wp_usermeta tables for accounts created or modified outside of normal registration workflows.
- Correlate plugin version <= 6.0.8.6 with inbound requests touching authentication-adjacent handlers.
Monitoring Recommendations
- Enable verbose logging on the WordPress site and forward logs to a centralized analytics platform for correlation.
- Monitor for privilege changes on existing accounts, particularly transitions to administrator or editor roles.
- Alert on bulk submission activity and on requests that bypass standard form-rendered nonces.
How to Mitigate CVE-2026-49764
Immediate Actions Required
- Update the RegistrationMagic plugin to the patched release as published by the vendor; do not run versions <= 6.0.8.6 on production.
- Audit all WordPress user accounts and remove any unauthorized administrators, editors, or contributors created during the exposure window.
- Rotate credentials for high-privilege accounts and invalidate active sessions site-wide.
- Review recent plugin and theme changes for unauthorized modifications.
Patch Information
Consult the Patchstack Vulnerability Report for fixed-version guidance and vendor advisories. Apply the update through the WordPress admin dashboard or via WP-CLI as soon as it is available in your environment.
Workarounds
- Disable the RegistrationMagic plugin until the patched version can be deployed if no fix is yet installable.
- Restrict access to plugin endpoints at the web application firewall (WAF) by blocking unauthenticated requests to RegistrationMagic action handlers.
- Place the WordPress admin area behind network-level access controls or HTTP authentication during the remediation window.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
