CVE-2025-12646: WordPress Community Events SQLi Flaw

CVE-2025-12646 Overview

The Community Events plugin for WordPress contains a SQL injection vulnerability in the dayofyear parameter. The flaw affects all versions up to and including 1.5.4. Insufficient escaping of user-supplied input and inadequate query preparation allow unauthenticated attackers to append arbitrary SQL to existing database queries. Successful exploitation enables extraction of sensitive data from the WordPress backend database, including user credentials, session tokens, and configuration values stored in wp_options. The issue is classified under CWE-89: Improper Neutralization of Special Elements used in an SQL Command.

Critical Impact

Unauthenticated remote attackers can exfiltrate sensitive database contents from any WordPress site running Community Events plugin version 1.5.4 or earlier.

Affected Products

• WordPress Community Events plugin versions ≤ 1.5.4
• WordPress installations with the plugin active and reachable over the network
• Any hosting environment exposing the vulnerable plugin endpoint

Discovery Timeline

• 2025-11-19 - CVE-2025-12646 published to the National Vulnerability Database
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-12646

Vulnerability Analysis

The vulnerability resides in the Community Events plugin's handling of the dayofyear HTTP parameter. The plugin concatenates the user-supplied value directly into a SQL statement without using prepared statements or sanitization helpers such as wpdb::prepare() or esc_sql(). An attacker can submit a crafted dayofyear value containing SQL syntax. The injected fragment becomes part of the executed query, allowing union-based or boolean-based extraction techniques.

The attack surface is network-reachable and requires no authentication or user interaction. The CVSS impact profile reflects confidentiality compromise without integrity or availability effects, consistent with a read-oriented injection that returns query results to the attacker.

Root Cause

The root cause is missing input neutralization on the dayofyear parameter combined with the absence of parameter binding in the underlying SQL query. WordPress provides $wpdb->prepare() with placeholders such as %d for integer values, but the plugin code path does not apply this protection before executing the query.

Attack Vector

The attack vector is network-based. An attacker sends an HTTP request to the plugin endpoint with a malicious dayofyear value. The injected payload typically uses UNION SELECT statements to retrieve columns from sensitive tables such as wp_users, returning the data in the application response or in inferred boolean conditions.

No verified exploit code has been published. Technical details are available in the Wordfence Vulnerability Report and the upstream fix in the WordPress plugin changeset.

Detection Methods for CVE-2025-12646

Indicators of Compromise

• HTTP requests containing SQL keywords such as UNION, SELECT, SLEEP, or INFORMATION_SCHEMA in the dayofyear query parameter
• Unusual outbound database query patterns originating from the web server PHP process
• Web server access logs showing repeated requests to Community Events plugin endpoints with encoded or unusually long dayofyear values
• Unexpected reads against wp_users, wp_usermeta, or wp_options tables in MySQL query logs

Detection Strategies

• Enable WordPress database query logging and alert on queries referencing dayofyear with non-numeric content
• Deploy web application firewall rules that block SQL metacharacters in the dayofyear parameter
• Inspect access logs for HTTP requests with encoded payloads such as %27, %20UNION, or -- targeting plugin URLs

Monitoring Recommendations

• Monitor authentication anomalies that may follow credential extraction from wp_users
• Track new administrator account creation and password reset events in WordPress audit logs
• Alert on outbound HTTP traffic from the web server to unknown destinations, indicating possible data staging

How to Mitigate CVE-2025-12646

Immediate Actions Required

• Update the Community Events plugin to a version newer than 1.5.4 once the maintainer publishes a fixed release
• Disable or remove the Community Events plugin if a patched version is not yet available
• Review WordPress user tables for unauthorized accounts and rotate administrator credentials and secret keys in wp-config.php
• Audit web server and database logs for prior exploitation attempts targeting the dayofyear parameter

Patch Information

The upstream code change addressing this issue is published in the WordPress plugin repository at changeset 3396731. Site administrators should apply the corresponding plugin update through the WordPress admin dashboard or by deploying the updated plugin files directly.

Workarounds

• Block requests containing non-integer values in the dayofyear parameter at the web application firewall or reverse proxy layer
• Restrict access to plugin endpoints by IP allowlist where the plugin is used internally
• Apply virtual patching rules in ModSecurity or equivalent WAF to reject SQL syntax in query parameters

# Example ModSecurity rule to block SQL metacharacters in the dayofyear parameter
SecRule ARGS:dayofyear "@rx [^0-9]" \
    "id:1012646,phase:2,deny,status:403,\
    msg:'CVE-2025-12646 Community Events SQLi attempt',\
    logdata:'Matched dayofyear=%{MATCHED_VAR}'"