CVE-2024-50491: Micahblu Rsvp Me SQLi Vulnerability

CVE-2024-50491 Overview

CVE-2024-50491 is a critical SQL Injection vulnerability affecting the RSVP ME WordPress plugin developed by Micah Blu. This vulnerability allows unauthenticated attackers to inject malicious SQL commands through user-controlled input, potentially compromising the entire WordPress database and underlying server infrastructure.

Critical Impact

This SQL Injection vulnerability requires no authentication, enabling attackers to extract sensitive data, modify database contents, or potentially achieve remote code execution on vulnerable WordPress installations.

Affected Products

• RSVP ME WordPress Plugin versions up to and including 1.9.9
• WordPress sites running vulnerable RSVP ME plugin installations
• Micahblu RSVP ME (cpe:2.3:a:micahblu:rsvp_me:*:*:*:*:*:wordpress:*:*)

Discovery Timeline

• 2024-10-28 - CVE-2024-50491 published to NVD
• 2024-11-13 - Last updated in NVD database

Technical Details for CVE-2024-50491

Vulnerability Analysis

This SQL Injection vulnerability (CWE-89) exists in the RSVP ME WordPress plugin due to improper neutralization of special elements used in SQL commands. The vulnerability allows attackers to manipulate database queries by injecting malicious SQL statements through user-controllable input fields.

The attack can be executed remotely over the network without requiring any user interaction or prior authentication. This makes the vulnerability particularly dangerous as it provides an accessible attack surface for malicious actors scanning for vulnerable WordPress installations.

Successful exploitation could allow attackers to read sensitive data from the WordPress database including user credentials, personal information, and plugin configurations. In more severe scenarios, attackers could leverage the SQL injection to modify or delete database records, escalate privileges, or potentially achieve code execution depending on the database configuration and permissions.

Root Cause

The root cause of this vulnerability is insufficient input validation and sanitization within the RSVP ME plugin. User-supplied data is incorporated directly into SQL queries without proper parameterization or escaping, allowing attackers to break out of the intended query structure and execute arbitrary SQL commands.

WordPress plugins that handle user input for database operations must use prepared statements or parameterized queries to prevent SQL injection. The RSVP ME plugin failed to implement these security controls in versions through 1.9.9.

Attack Vector

The attack vector is network-based, allowing remote exploitation without authentication. Attackers can craft malicious HTTP requests containing SQL injection payloads targeting vulnerable endpoints in the RSVP ME plugin.

A typical attack sequence involves:

1. Identifying WordPress sites running vulnerable RSVP ME plugin versions
2. Crafting malicious input containing SQL injection payloads
3. Submitting the payload through plugin functionality (RSVP forms, API endpoints)
4. Extracting data or manipulating the database through the injected SQL commands

The vulnerability can be exploited through standard SQL injection techniques including UNION-based, error-based, blind boolean-based, and time-based attacks depending on the specific injection point and database configuration.

Detection Methods for CVE-2024-50491

Indicators of Compromise

• Unusual SQL error messages appearing in WordPress or web server logs
• Unexpected database queries containing SQL syntax like UNION SELECT, OR 1=1, or -- comment sequences
• Database access logs showing queries accessing sensitive tables like wp_users from RSVP ME plugin contexts
• Evidence of data exfiltration or unauthorized database modifications

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common SQL injection patterns
• Monitor web server access logs for requests containing suspicious SQL keywords and special characters
• Deploy database activity monitoring to identify unusual query patterns originating from the WordPress application
• Use WordPress security plugins that provide real-time monitoring for known vulnerability exploitation attempts

Monitoring Recommendations

• Enable detailed logging for the WordPress database and web server
• Configure alerting for failed SQL queries that may indicate injection attempts
• Monitor for unusually large data transfers from the database that could indicate data exfiltration
• Regularly audit WordPress plugin inventory to identify outdated or vulnerable components

How to Mitigate CVE-2024-50491

Immediate Actions Required

• Audit your WordPress installation to determine if the RSVP ME plugin is installed and identify the version
• Remove or deactivate the RSVP ME plugin if a patched version is not available
• Review WordPress database and access logs for signs of exploitation
• Implement a Web Application Firewall (WAF) with SQL injection protection rules
• Consider resetting database credentials if exploitation is suspected

Patch Information

Refer to the Patchstack vulnerability database for the latest patching guidance and remediation steps. Check the WordPress plugin repository for updated versions of RSVP ME that address this SQL injection vulnerability.

Workarounds

• Temporarily disable or remove the RSVP ME plugin until a patched version is available
• Deploy a Web Application Firewall (WAF) with SQL injection detection rules as an interim protection measure
• Restrict database user privileges for the WordPress application to minimize potential impact
• Implement network-level access controls to limit exposure of vulnerable WordPress installations

# Check for RSVP ME plugin installation
wp plugin list | grep rsvp

# Deactivate vulnerable plugin if installed
wp plugin deactivate rsvp-me

# Alternative: Remove the plugin entirely
wp plugin delete rsvp-me