Vulnerability · Published Sep 19, 2026 · Assigned by Wordfence

CVE-2026-6295WP Optimizer <= 2.5.0 - Authenticated (Administrator+) SQL Injection via 's' Parameter

Medium 4.9

In plain English

A medium-severity SQL injection in WP Optimizer – PageSpeed, Cache, Minify & Core Web Vitals from sh1zen. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).

Severity (CVSS 3.1)4.9Medium

Exploit odds (30 days)0.5%top 56.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The WP Optimizer plugin for WordPress is vulnerable to SQL Injection via the 's' parameter in all versions up to and including 2.5.0. This is due to an unsafe subquery-detection branch in the Query::parse_key_compare_field() method that, when the user-supplied value matches the regex ^[(\s]*SELECT\s+, wraps the value in parentheses and embeds it directly into the SQL string without any escaping or quoting. While the normal LIKE code path correctly uses esc_sql($wpdb->esc_like(...)) and wraps the value in single quotes, this branch completely bypasses those protections. Because the attack payload (SELECT ...) contains no single quotes, WordPress's wp_magic_quotes() provides no protection. This makes it possible for authenticated attackers with administrator-level access to inject arbitrary SQL subqueries — including time-based blind payloads — that can be used to extract sensitive information from the database.

Affected products (as reported)

Vendor	Product	Versions
sh1zen	WP Optimizer – PageSpeed, Cache, Minify & Core Web Vitals	0 – through 2.5.0

Weakness: CWE-89 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

In plain English

Official description

Affected products (as reported)

References