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CVE-2026-16094— Invisible Anti-Spam & CAPTCHA <= 5.1 - Authenticated (Editor+) SQL Injection via 'key' Parameter

Quick assessment

Affected
matthiasnordwig Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress Invisible Anti-Spam & CAPTCHA是WordPress基金会开源的一款隐形反垃圾邮件与验证码组件。 WordPress Invisible Anti-Spam & CAPTCHA 5.1及之前版本存在SQL注入漏洞，该漏洞源于对'key'参数的用户输入转义不足和SQL查询准备不足，可能导致具有编辑级别及以上访问权限的认证攻击者向现有查询追加额外SQL查询，从而提取数据库中的敏感信息。

CVSS 4.9 · Medium EPSS 0.58% · P47

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
matthiasnordwig Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms ≤ 5.1 affected
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I. Basic Information for CVE-2026-16094

Vulnerability Information
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Vulnerability Title
Invisible Anti-Spam & CAPTCHA <= 5.1 - Authenticated (Editor+) SQL Injection via 'key' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms plugin for WordPress is vulnerable to generic SQL Injection via the 'key' parameter 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Invisible Anti-Spam & CAPTCHA SQL注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Invisible Anti-Spam & CAPTCHA是WordPress基金会开源的一款隐形反垃圾邮件与验证码组件。 WordPress Invisible Anti-Spam & CAPTCHA 5.1及之前版本存在SQL注入漏洞，该漏洞源于对'key'参数的用户输入转义不足和SQL查询准备不足，可能导致具有编辑级别及以上访问权限的认证攻击者向现有查询追加额外SQL查询，从而提取数据库中的敏感信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
matthiasnordwig Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms 0 ~ 5.1 -

II. Public POCs for CVE-2026-16094

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III. Intelligence Information for CVE-2026-16094

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Vendor Advisories for CVE-2026-16094 (1)

Other References for CVE-2026-16094 (1)

Same Patch Batch · matthiasnordwig · 2026-08-15 · 3 CVEs total

CVE-2026-16145 7.2 HIGH Invisible Anti-Spam & CAPTCHA <= 5.1 - Unauthenticated Stored Cross-Site Scripting via 'ac
CVE-2026-16146 4.9 MEDIUM Invisible Anti-Spam & CAPTCHA <= 5.1 - Authenticated (Editor+) SQL Injection via Pattern J

IV. Related Vulnerabilities

Same product: Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms
Same vendor: matthiasnordwig
Same weakness: CWE-89

V. Comments for CVE-2026-16094

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