CVE-2025-46463: Mailing Group Listserv SQLi Vulnerability

CVE-2025-46463 Overview

CVE-2025-46463 is a SQL Injection vulnerability in the Yamna Khawaja Mailing Group Listserv plugin (wp-mailing-group) for WordPress. The flaw stems from improper neutralization of special elements in SQL commands [CWE-89]. Attackers with low-level privileges can inject malicious SQL statements through unsanitized inputs. The vulnerability affects all plugin versions up to and including 3.0.4. Exploitation can expose sensitive database contents and impact adjacent components beyond the vulnerable scope.

Critical Impact
Authenticated attackers can execute arbitrary SQL queries against the WordPress database, leading to confidentiality compromise across the affected site and connected systems.

Affected Products

Yamna Khawaja Mailing Group Listserv (wp-mailing-group)
Versions from n/a through 3.0.4
WordPress installations using the affected plugin

Discovery Timeline

2025-05-23 - CVE CVE-2025-46463 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-46463

Vulnerability Analysis

The vulnerability is classified under [CWE-89], Improper Neutralization of Special Elements used in an SQL Command. The Mailing Group Listserv plugin fails to sanitize or parameterize user-supplied input before incorporating it into SQL queries. An attacker with at least low-privileged authenticated access can craft requests that alter query logic. Successful exploitation allows reading sensitive data from the WordPress database, including user credentials, session tokens, and configuration values. The scope is marked as changed, indicating impact extends beyond the immediate vulnerable component to other resources.

Root Cause

The plugin constructs SQL statements by concatenating untrusted input directly into query strings. WordPress provides safe abstractions through $wpdb->prepare() and prepared statements, but the affected code paths do not use these consistently. Special characters such as quotes and SQL keywords pass through to the database engine without escaping. This permits attackers to break out of intended query context and append arbitrary SQL clauses.

Attack Vector

The attack is network-accessible and requires only low privileges, typical of an authenticated subscriber or contributor account. The attacker submits crafted parameters to plugin endpoints that reach the vulnerable SQL execution paths. No user interaction is required to complete the exploit chain. Reference details are documented in the Patchstack WordPress Vulnerability Database.

No verified public proof-of-concept code is currently available. The vulnerability mechanism is described in prose based on the Patchstack advisory and CWE-89 classification.

Detection Methods for CVE-2025-46463

Indicators of Compromise

Unusual SQL syntax fragments such as UNION SELECT, OR 1=1, or -- in HTTP request parameters targeting /wp-admin/admin-ajax.php or plugin endpoints
Unexpected database errors or wpdb warnings logged near requests to wp-mailing-group endpoints
Authenticated low-privilege accounts issuing high-volume parameter requests against the plugin
Outbound database connections or file writes originating from PHP-FPM workers tied to plugin activity

Detection Strategies

Inspect web server access logs for encoded SQL metacharacters in parameters submitted to wp-mailing-group routes
Enable WordPress query logging and review for queries containing concatenated user input from plugin handlers
Deploy a Web Application Firewall ruleset that flags SQL injection signatures against authenticated WordPress sessions
Correlate authentication events with sudden access to administrative database tables such as wp_users or wp_usermeta

Monitoring Recommendations

Ingest WordPress and web server logs into a centralized SIEM for behavioral correlation
Alert on anomalous SQL query patterns or error rates originating from the plugin
Monitor user privilege changes and new administrator account creation following plugin requests
Track outbound data transfer volumes from the WordPress host to identify exfiltration

How to Mitigate CVE-2025-46463

Immediate Actions Required

Disable or remove the Mailing Group Listserv plugin until a patched release is available
Audit all WordPress user accounts and remove unnecessary low-privilege access
Rotate database credentials, WordPress secret keys, and administrator passwords if compromise is suspected
Restrict plugin endpoints behind authentication and IP allowlisting where feasible

Patch Information

At the time of publication, no fixed version beyond 3.0.4 is referenced in the available advisory. Administrators should monitor the Patchstack advisory and the official plugin repository for a security release. Apply the vendor patch immediately once published.

Workarounds

Deactivate the wp-mailing-group plugin and select an alternative mailing list solution
Deploy WAF rules that block SQL injection payloads targeting WordPress plugin endpoints
Enforce least privilege so untrusted users cannot reach authenticated plugin functionality
Implement database-level monitoring to detect anomalous queries from the WordPress service account

bash

# Disable the vulnerable plugin via WP-CLI
wp plugin deactivate wp-mailing-group
wp plugin delete wp-mailing-group

# Verify removal
wp plugin list --status=active | grep -i mailing-group