CVE-2026-16146 MEDIUM

CVE-2026-16146: Invisible Anti-Spam & CAPTCHA <= 5.1 - Authenticated (Editor+) SQL Injection via Pattern JSON Keys/Values

Vendor Matthiasnordwig
Product Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms
Weakness CWE-89 · SQLi
Published August 15, 2026
Last update August 15, 2026

CVSS base score

4.9/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

What the vulnerability does

01Description

The Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms plugin for WordPress is vulnerable to generic SQL Injection via Pattern JSON Keys/Values in all versions up to, and including, 5.1 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with editor-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

Explanation of Vulnerability in Simple Terms

02Summary

A SQL injection vulnerability in Invisible Anti-Spam & CAPTCHA allows authenticated administrators to read sensitive data from the site's database. The vulnerability requires high-level admin privileges and does not affect data integrity or availability. Sites running version 5.1 or earlier should update to a patched version.

What an attacker can do

03Attacker Capabilities

Read sensitive data from the site database via SQL injection.

Potential impact on your site

04Site Impact

An admin account compromise could expose database contents including user data and configuration secrets.

Conditions required to exploit

05Prerequisites

Attacker must have administrator-level access to the WordPress site.

Key dates

06Disclosure timeline

August 15, 2026 CVE published

Related vulnerabilities

08Related CVE