CVE-2026-95593: Ultimeter SQL Injection Vulnerability

CVE-2026-95593 Overview

CVE-2026-95593 is a SQL Injection vulnerability [CWE-89] affecting the Ultimeter WordPress plugin in versions up to and including 3.0.8. The flaw allows authenticated users with Editor-level privileges to inject arbitrary SQL statements through vulnerable input handling in the plugin. Successful exploitation lets an attacker read sensitive database contents and impact database availability. Patchstack has published an advisory covering the issue, and the vulnerability was added to the National Vulnerability Database in September 2026.

Critical Impact
Authenticated Editor-level attackers can execute arbitrary SQL queries against the WordPress database, exposing confidential data and disrupting site availability.

Affected Products

Ultimeter WordPress plugin versions <= 3.0.8

Discovery Timeline

2026-09-23 - CVE-2026-95593 published to the National Vulnerability Database
2026-09-23 - Last updated in NVD database

Technical Details for CVE-2026-95593

Vulnerability Analysis

CVE-2026-95593 is a SQL Injection vulnerability in the Ultimeter WordPress plugin at versions 3.0.8 and earlier. The issue is reachable by authenticated users who hold Editor privileges within WordPress. Because the attack traverses a privilege boundary from Editor to underlying database, the scope changes and the impact extends beyond the plugin's own context. An attacker who exploits the flaw can read arbitrary rows from the WordPress database, including hashed credentials, session tokens, and post metadata. The advisory published by Patchstack classifies the weakness under CWE-89: Improper Neutralization of Special Elements used in an SQL Command.

Root Cause

The root cause is improper sanitization of user-supplied input before its use in SQL query construction. Ultimeter concatenates values into database queries without parameterization or adequate escaping. Editor-role users can supply crafted parameters that terminate the intended query and append attacker-controlled SQL clauses. WordPress's $wpdb API supports prepared statements, but the vulnerable code paths did not use them consistently.

Attack Vector

The vulnerability is exploitable remotely over the network. The attacker must first authenticate to the target WordPress installation with an Editor account. Once authenticated, the attacker sends crafted HTTP requests to the vulnerable Ultimeter endpoint with malicious SQL fragments embedded in request parameters. No user interaction from an administrator is required. Detailed technical reproduction steps are available in the Patchstack SQL Injection Vulnerability Advisory.

Detection Methods for CVE-2026-95593

Indicators of Compromise

Unexpected requests to Ultimeter plugin endpoints containing SQL keywords such as UNION, SELECT, SLEEP, BENCHMARK, or INFORMATION_SCHEMA.
Anomalous query patterns in MySQL/MariaDB slow query logs originating from wp-admin sessions belonging to Editor accounts.
Editor-role accounts issuing requests to plugin URLs they do not typically use, especially outside of normal working hours.

Detection Strategies

Enable a WordPress web application firewall (WAF) with rules that detect SQL injection payloads targeting plugin endpoints.
Correlate authentication logs with plugin request logs to surface Editor accounts executing unusual queries against the Ultimeter endpoints.
Monitor the wp_users and wp_usermeta tables for out-of-band read patterns and unexpected privilege changes.

Monitoring Recommendations

Ingest WordPress access, error, and database logs into a centralized log platform for retention and query.
Alert on HTTP 500 spikes from Ultimeter routes, which often accompany failed SQL injection probing.
Review Editor account activity daily until all instances are patched to version above 3.0.8.

How to Mitigate CVE-2026-95593

Immediate Actions Required

Update the Ultimeter plugin to a version newer than 3.0.8 as soon as a fixed release is available from the vendor.
Audit all WordPress accounts assigned the Editor role and remove any that are unnecessary or inactive.
Rotate database credentials and WordPress secret keys if compromise is suspected.

Patch Information

Refer to the Patchstack SQL Injection Vulnerability Advisory for the latest patch status and remediation guidance from the plugin maintainers. Apply the vendor-supplied update through the WordPress plugin manager once available.

Workarounds

Temporarily deactivate the Ultimeter plugin until a patched version can be installed.
Restrict Editor role assignments to trusted personnel and enforce multi-factor authentication for those accounts.
Deploy virtual patching rules via a WordPress-aware WAF to block SQL injection payloads targeting Ultimeter endpoints.

bash

# Configuration example
# Disable the Ultimeter plugin from the WordPress CLI until a patch is applied
wp plugin deactivate ultimeter

# Optionally remove the plugin entirely
wp plugin uninstall ultimeter