CVE-2024-9822: Pedalo Connector Auth Bypass Vulnerability

CVE-2024-9822 Overview

The Pedalo Connector plugin for WordPress contains a critical authentication bypass vulnerability in versions up to and including 2.0.5. This vulnerability stems from insufficient restriction on the login_admin_user function, which allows unauthenticated attackers to bypass authentication mechanisms and gain unauthorized access to WordPress administrator accounts.

The flaw enables attackers to authenticate as the first user in the WordPress database, which is typically the site administrator. If the first user does not exist, the vulnerability allows authentication as the first available administrator account, effectively granting full administrative privileges to unauthorized parties.

Critical Impact

Unauthenticated attackers can gain full WordPress administrator access without credentials, enabling complete site takeover, data theft, malware injection, and persistent backdoor installation.

Affected Products

• Pedalo Connector plugin for WordPress versions up to and including 2.0.5
• WordPress installations using the vulnerable Pedalo Connector plugin

Discovery Timeline

• 2024-10-11 - CVE-2024-9822 published to NVD
• 2024-11-15 - Last updated in NVD database

Technical Details for CVE-2024-9822

Vulnerability Analysis

This authentication bypass vulnerability (CWE-288: Authentication Bypass Using an Alternate Path or Channel) exists in the Pedalo Connector plugin's public-facing functionality. The vulnerable code resides in the login_admin_user function within the class-pedalo_connector-public.php file.

The function fails to implement proper authentication checks before granting administrative access. When triggered, it automatically authenticates the requesting user as the first user in the WordPress database—which is conventionally the site administrator created during WordPress installation. This design flaw bypasses all standard WordPress authentication mechanisms including password verification, two-factor authentication, and login attempt limiting.

The network-accessible nature of this vulnerability means attackers require no prior authentication, no user interaction, and face low attack complexity to exploit this flaw. Successful exploitation grants complete confidentiality, integrity, and availability impact over the WordPress installation.

Root Cause

The root cause of this vulnerability is the insufficient access control implementation in the login_admin_user function. The function was designed to provide administrative login functionality but lacks proper authorization checks to verify the legitimacy of the authentication request. This represents a classic case of broken authentication where an alternate authentication path exists without proper security controls.

The vulnerable code at line 118 of class-pedalo_connector-public.php exposes this functionality without requiring any form of pre-authentication or verification token.

Attack Vector

The attack is network-based and can be executed remotely by unauthenticated attackers. The exploitation process involves sending crafted requests to the WordPress installation that trigger the login_admin_user function. Upon successful exploitation, the attacker receives a valid authentication session for the administrator account.

The vulnerability does not require any special privileges, user interaction, or sophisticated attack techniques. Attackers can identify vulnerable installations through plugin enumeration and subsequently gain immediate administrative access. For detailed technical analysis, refer to the Wordfence Vulnerability Intelligence report.

Detection Methods for CVE-2024-9822

Indicators of Compromise

• Unexpected administrator login events without corresponding authentication attempts in WordPress logs
• Unusual session creation activities for administrator accounts from unknown IP addresses
• Plugin modifications or new plugin installations without administrator authorization
• Creation of new administrator accounts or privilege escalation of existing accounts

Detection Strategies

• Monitor WordPress authentication logs for administrator logins that bypass standard login forms
• Implement Web Application Firewall (WAF) rules to detect and block requests targeting the login_admin_user function
• Review access logs for suspicious requests to Pedalo Connector plugin endpoints
• Deploy file integrity monitoring to detect unauthorized changes to WordPress core files and plugins

Monitoring Recommendations

• Enable detailed WordPress authentication logging and forward logs to centralized SIEM systems
• Configure alerts for successful administrator authentications from new or suspicious IP addresses
• Monitor for rapid succession of administrative actions that may indicate automated post-exploitation activity
• Implement network traffic analysis to detect unusual patterns targeting WordPress plugin endpoints

How to Mitigate CVE-2024-9822

Immediate Actions Required

• Immediately update the Pedalo Connector plugin to a patched version if available
• If no patch is available, deactivate and remove the Pedalo Connector plugin until a security update is released
• Audit WordPress administrator accounts for unauthorized access or changes
• Review WordPress audit logs for signs of prior exploitation and compromise

Patch Information

Organizations should check the WordPress plugin repository for updated versions of the Pedalo Connector plugin that address this authentication bypass vulnerability. The vulnerability affects versions up to and including 2.0.5. Consult the WordPress Plugin Trac for the latest version information and changelogs.

Workarounds

• Disable or uninstall the Pedalo Connector plugin if it is not critical to site operations
• Implement IP-based access controls to restrict WordPress admin access to trusted networks only
• Deploy a Web Application Firewall with rules to block unauthenticated requests to plugin-specific endpoints
• Enable WordPress two-factor authentication as an additional layer of defense for administrator accounts

# Disable Pedalo Connector plugin via WP-CLI
wp plugin deactivate pedalo-connector

# Verify plugin status
wp plugin status pedalo-connector

# Review active administrator accounts
wp user list --role=administrator --fields=ID,user_login,user_email,user_registered