CVE-2026-2429: WordPress Community Events SQLi Vulnerability

CVE-2026-2429 Overview

The Community Events plugin for WordPress contains a SQL Injection vulnerability in the on_save_changes_venues function that can be exploited through the ce_venue_name CSV field. This vulnerability affects all versions up to and including 1.5.8, allowing authenticated attackers with Administrator-level access to extract sensitive information from the WordPress database through maliciously crafted CSV file uploads.

Critical Impact

Authenticated attackers with administrative privileges can exploit insufficient input sanitization to append malicious SQL queries and extract sensitive database information through CSV file uploads.

Affected Products

• Community Events plugin for WordPress versions up to and including 1.5.8
• WordPress installations using vulnerable Community Events plugin versions

Discovery Timeline

• 2026-03-07 - CVE-2026-2429 published to NVD
• 2026-03-09 - Last updated in NVD database

Technical Details for CVE-2026-2429

Vulnerability Analysis

This SQL Injection vulnerability (CWE-89) exists due to insufficient escaping of user-supplied CSV data combined with inadequate prepared statement usage in the existing SQL query. The vulnerable code path is triggered when an administrator uploads a CSV file containing venue information, specifically through the ce_venue_name field processing in the on_save_changes_venues function.

The attack requires network access and administrative authentication, but once those conditions are met, the attacker can successfully extract confidential database information. While the scope is unchanged and there is no impact on integrity or availability, the confidentiality impact is high as sensitive database contents can be exfiltrated.

Root Cause

The root cause stems from improper neutralization of special elements used in SQL commands. The on_save_changes_venues function at line 743 of community-events.php fails to properly sanitize the ce_venue_name field from uploaded CSV files before incorporating the data into SQL queries. WordPress provides the $wpdb->prepare() method for parameterized queries, but this code path does not adequately leverage these protections, allowing SQL injection payloads embedded in CSV data to be executed.

Attack Vector

An attacker with Administrator-level access exploits this vulnerability by crafting a malicious CSV file containing SQL injection payloads in the venue name field. When the CSV is uploaded through the venue import functionality, the unsanitized data is concatenated directly into SQL queries.

The attack flow involves:

1. Authenticating to WordPress with Administrator credentials
2. Creating a CSV file with SQL injection payloads in the ce_venue_name column
3. Uploading the malicious CSV through the Community Events venue import feature
4. The injected SQL appends to existing queries, enabling data extraction through techniques like UNION-based or time-based blind SQL injection

For technical details on the vulnerable code path, see the WordPress Plugin Tag Code reference.

Detection Methods for CVE-2026-2429

Indicators of Compromise

• Unusual CSV file uploads to the Community Events plugin venue import functionality
• Database query logs showing malformed or suspicious SQL queries originating from venue import operations
• Administrator accounts uploading CSV files with unusual or encoded content in venue name fields
• Database access logs indicating extraction of sensitive tables (wp_users, wp_options) through venue-related queries

Detection Strategies

• Monitor WordPress admin activity logs for CSV uploads to the Community Events plugin
• Implement database query logging and alert on queries containing UNION SELECT, SLEEP(), or other SQL injection signatures originating from the plugin
• Deploy a Web Application Firewall (WAF) with SQL injection detection rules covering file upload endpoints
• Review access logs for repeated venue import operations, especially from recently created or compromised admin accounts

Monitoring Recommendations

• Enable WordPress audit logging to track all administrator actions, particularly file uploads
• Configure database monitoring to flag queries with abnormal execution times or result sets from the Community Events plugin context
• Implement file integrity monitoring on uploaded CSV files to detect potential injection attempts
• Set up alerts for any access to sensitive database tables from non-standard query sources

How to Mitigate CVE-2026-2429

Immediate Actions Required

• Update the Community Events plugin to a version newer than 1.5.8 that contains the security fix
• Audit recent CSV uploads to the venue import feature for suspicious content
• Review database access logs for evidence of exploitation
• Consider temporarily disabling the venue CSV import functionality until patched

Patch Information

A security patch has been released to address this vulnerability. The fix involves proper sanitization and parameterization of the CSV input data before inclusion in SQL queries. Details of the code changes can be reviewed in the WordPress Changeset Details. Additional vulnerability information is available from the Wordfence Vulnerability Report.

Workarounds

• Restrict Administrator account access to only trusted personnel until the plugin is updated
• Disable the venue CSV import functionality by removing or restricting access to the import page
• Implement additional input validation at the web server level using ModSecurity or similar WAF rules to filter SQL injection patterns in file uploads
• Consider using a WordPress security plugin to add additional SQL injection protection layers

# Temporary mitigation: Restrict access to plugin admin pages via .htaccess
# Add to wp-content/plugins/community-events/.htaccess
<Files "community-events.php">
    Order Deny,Allow
    Deny from all
    Allow from 127.0.0.1
</Files>