CVE-2025-39486: Rankie WordPress Plugin SQLi Vulnerability

CVE-2025-39486 Overview

CVE-2025-39486 is a SQL Injection vulnerability in the ValvePress Rankie WordPress plugin. The flaw affects all versions of Rankie up to and including 1.8.2. The plugin fails to properly neutralize special elements used in SQL commands, allowing authenticated attackers to inject arbitrary SQL into database queries. The vulnerability is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). Exploitation requires low-privilege network access and can lead to disclosure of sensitive database contents and partial impact on availability. The issue was published to the National Vulnerability Database (NVD) on June 17, 2025.

Critical Impact
Authenticated attackers can extract sensitive WordPress database contents, including user records and credentials, through crafted SQL payloads.

Affected Products

ValvePress Rankie WordPress plugin versions prior to and including 1.8.2
WordPress sites running Rankie with the valvepress-rankie slug
All deployments not yet upgraded to a patched release

Discovery Timeline

2025-06-17 - CVE-2025-39486 published to NVD
2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-39486

Vulnerability Analysis

The Rankie plugin handles keyword ranking data and persists results to the WordPress database through $wpdb queries. One or more of these queries concatenate untrusted input directly into SQL statements without using prepared statements or proper escaping. An authenticated user with low privileges can submit crafted input that breaks out of the intended query context. The injected payload is then executed by the underlying MySQL or MariaDB engine with the privileges of the WordPress database user. This grants attackers read access to arbitrary tables, including wp_users and wp_options, which store password hashes and site secrets.

Root Cause

The root cause is missing parameterization in plugin database calls. Rankie passes attacker-controllable values into SQL strings without invoking $wpdb->prepare() or equivalent sanitization routines such as esc_sql(). This permits SQL metacharacters to alter query structure, satisfying the conditions described in CWE-89.

Attack Vector

An attacker authenticates to the target WordPress instance with any account that can reach the vulnerable Rankie endpoint. The attacker then submits a request containing SQL metacharacters in a parameter consumed by the plugin's database query. Because the scope is changed (S:C in the CVSS vector), the impact extends beyond the plugin to the entire WordPress database. The vulnerability mechanism is documented in the Patchstack SQL Injection Report. No public proof-of-concept code has been released at the time of publication.

Detection Methods for CVE-2025-39486

Indicators of Compromise

Unexpected HTTP requests to Rankie plugin endpoints containing SQL syntax such as UNION SELECT, SLEEP(, OR 1=1, or encoded variants
Web server access logs showing repeated parameter probing against /wp-admin/admin.php?page=rankie or related Rankie URIs
Database error messages referencing the wp_ table prefix returned to authenticated low-privilege users
Anomalous outbound queries from the WordPress database user to system tables like information_schema.tables

Detection Strategies

Enable WordPress debug logging and review wp-content/debug.log for SQL syntax errors originating from Rankie functions
Deploy a Web Application Firewall (WAF) rule set that flags SQL injection signatures in authenticated POST and GET parameters
Correlate authentication events with subsequent high-volume database queries in security telemetry
Inspect plugin source for direct concatenation of $_GET, $_POST, or $_REQUEST values into $wpdb->query() calls

Monitoring Recommendations

Forward web server, PHP, and MySQL query logs to a centralized analytics platform for retrospective hunting
Alert on outbound queries from the WordPress process targeting information_schema or mysql.user
Track plugin version inventory across WordPress estates to identify hosts still running Rankie <= 1.8.2
Baseline normal Rankie request patterns and alert on deviations in parameter length or content

How to Mitigate CVE-2025-39486

Immediate Actions Required

Deactivate the Rankie plugin until a fixed version is installed if a patched release is not yet available
Restrict access to WordPress administrative areas to known IP ranges using web server ACLs
Rotate WordPress administrator passwords and any API keys stored in wp_options if compromise is suspected
Review user accounts and remove unused low-privilege accounts that could be leveraged for authenticated exploitation

Patch Information

No fixed version was identified in the NVD record at the time of publication. The advisory states the issue affects Rankie from an unspecified initial release through versions less than or equal to 1.8.2. Site operators should monitor the Patchstack advisory and the official ValvePress channels for a patched release and apply it immediately once available.

Workarounds

Use a WAF with SQL injection signatures, such as ModSecurity with the OWASP Core Rule Set, in front of the WordPress site
Apply virtual patching via Patchstack or equivalent WordPress security service that mitigates CVE-2025-39486
Enforce least privilege on the WordPress database user by removing FILE and unnecessary SELECT grants on non-WordPress schemas
Audit and reduce the population of subscriber-level and higher accounts that can reach Rankie functionality

bash

# Disable the vulnerable plugin via WP-CLI until a fix is released
wp plugin deactivate valvepress-rankie
wp plugin status valvepress-rankie

# Optional: remove the plugin directory entirely
wp plugin uninstall valvepress-rankie