CVE-2026-16146Network attack vectorHinoki check available

Authenticated database disclosure via unescaped pattern interpolation

Published Aug 15, 2026 · Updated Aug 15, 2026

SQL injection in Invisible Anti-Spam & CAPTCHA 5.1 and earlier allows remote authenticated users to extract WordPress database data. Message-list queries interpolate administrator-defined Pattern JSON keys and values into SQL LIKE conditions without escaping the input. Editor-level access is required; successful injection appends SQL to existing queries and exposes sensitive information without reported write or availability impact.

CVSS severity4.9
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

SQL injection in Invisible Anti-Spam & CAPTCHA 5.1 and earlier allows remote authenticated users to extract WordPress database data. Message-list queries interpolate administrator-defined Pattern JSON keys and values into SQL LIKE conditions without escaping the input. Editor-level access is required; successful injection appends SQL to existing queries and exposes sensitive information without reported write or availability impact.

The record

CVE
CVE-2026-16146
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
Matthias Nordwig
Product
Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms
Classifications
CWE-89, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Matthias Nordwig · Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Formsversion=0 <=5.1

Published CVSS scores

4.9WordfenceCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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