CVE-2024-35700: Userpro Privilege Escalation Vulnerability

CVE-2024-35700 Overview

CVE-2024-35700 is a critical Improper Privilege Management vulnerability affecting the UserPro plugin for WordPress developed by DeluxeThemes. This vulnerability allows unauthenticated attackers to escalate privileges and potentially take over user accounts on affected WordPress installations. The flaw stems from improper handling of privilege management within the plugin, enabling attackers to bypass authentication controls without any user interaction.

Critical Impact

This vulnerability enables unauthenticated account takeover, allowing attackers to gain administrative access to WordPress sites running vulnerable versions of the UserPro plugin.

Affected Products

• UserPro plugin versions from n/a through 5.1.8
• WordPress installations with the UserPro plugin installed
• All sites using userproplugin:userpro package

Discovery Timeline

• 2024-06-04 - CVE-2024-35700 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2024-35700

Vulnerability Analysis

This vulnerability is classified as CWE-269 (Improper Privilege Management), which occurs when a software application does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control. In the context of the UserPro plugin, this flaw allows unauthenticated users to escalate their privileges to higher-level accounts, including administrator roles.

The UserPro plugin is a popular WordPress membership and user profile plugin that provides user registration, login, and profile management functionality. The improper privilege management vulnerability allows attackers to manipulate the authentication and authorization mechanisms without requiring valid credentials.

Root Cause

The root cause of CVE-2024-35700 lies in the inadequate validation and enforcement of privilege levels within the UserPro plugin's authentication workflow. The plugin fails to properly verify user identity and privilege levels before granting access to sensitive functionality, allowing attackers to bypass authentication controls entirely.

This type of vulnerability typically arises when:

• User role assignments are not properly validated
• Session management lacks proper integrity checks
• Account recovery or password reset mechanisms can be manipulated
• User profile update functions don't verify ownership

Attack Vector

The attack can be executed remotely over the network without requiring any authentication or user interaction. An attacker targeting a vulnerable WordPress site can exploit this flaw to take over any user account, including administrator accounts, leading to complete site compromise.

The attack flow typically involves:

1. Identifying a WordPress site running a vulnerable version of UserPro (5.1.8 or earlier)
2. Exploiting the improper privilege management flaw to bypass authentication
3. Gaining access to victim accounts without valid credentials
4. Escalating privileges to administrator level for full site control

Technical details about the specific exploitation mechanism are available in the Patchstack Vulnerability Report.

Detection Methods for CVE-2024-35700

Indicators of Compromise

• Unexpected user role changes or privilege escalations in WordPress user database
• Anomalous login activity for administrator or high-privilege accounts
• Suspicious requests to UserPro plugin endpoints without valid authentication
• New administrator accounts created without legitimate authorization
• Unexpected changes to site configuration or content by unknown actors

Detection Strategies

• Monitor WordPress access logs for unusual patterns targeting UserPro plugin endpoints
• Implement Web Application Firewall (WAF) rules to detect privilege escalation attempts
• Enable detailed logging for user authentication and role change events
• Regularly audit user accounts for unauthorized privilege changes
• Deploy intrusion detection systems to monitor for account takeover patterns

Monitoring Recommendations

• Configure alerts for any administrator account creation or role changes
• Monitor failed and successful authentication attempts to identify brute force or bypass attempts
• Review WordPress audit logs for UserPro-related activity on a regular basis
• Implement real-time monitoring for changes to the wp_users and wp_usermeta database tables

How to Mitigate CVE-2024-35700

Immediate Actions Required

• Update the UserPro plugin to the latest patched version immediately
• Review all user accounts for unauthorized privilege escalations
• Reset passwords for all administrator accounts as a precautionary measure
• Audit recent site activity for signs of compromise
• Consider temporarily disabling the UserPro plugin if an immediate update is not possible

Patch Information

Organizations should update the UserPro plugin to a version newer than 5.1.8 that addresses this vulnerability. Contact the plugin vendor DeluxeThemes for information about the latest secure version. The vulnerability affects all versions up to and including 5.1.8.

For detailed patch information, refer to the Patchstack Vulnerability Report.

Workarounds

• Temporarily disable the UserPro plugin if patching is not immediately possible
• Implement Web Application Firewall (WAF) rules to block exploitation attempts
• Restrict access to WordPress admin areas using IP allowlisting
• Enable two-factor authentication for all administrator accounts
• Consider using WordPress security plugins to monitor for suspicious activity

# Configuration example - Disable UserPro plugin via WP-CLI
wp plugin deactivate userpro

# Check current plugin version
wp plugin list --name=userpro --fields=name,version,status

# Update to latest version when available
wp plugin update userpro