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Invisible Anti-Spam & CAPTCHA vulnerabilities
Invisible Anti-Spam & CAPTCHA has 4 known vulnerabilities in this database. The most recent published record is dated 17 Sep 2026.
- Known vulnerabilities
- 4
- Active installs
- 4,000+
- Latest version
- 6.1.0
- Last updated
- 24 Sep 2026
- Most recent
- 17 Sep 2026
Find it in your WordPress dashboard under Plugins. Severity is based on the CVSS score published with the CVE where one is available.
| Vulnerability | Severity | Affected | Fix | Published |
|---|---|---|---|---|
| Broken access control CVE-2026-91010 | Medium 4.3 | Before 5.1.1 | Fixed in 5.1.1 | 17 Sep 2026 |
| Cross-site scripting (XSS) CVE-2026-16145 | High 7.2 | Up to 5.1 | Fixed in a later version (latest 6.1.0) | 15 Aug 2026 |
| SQL injection CVE-2026-16146 | Medium 4.9 | Up to 5.1 | Fixed in a later version (latest 6.1.0) | 15 Aug 2026 |
| SQL injection CVE-2026-16094 | Medium 4.9 | Up to 5.1 | Fixed in a later version (latest 6.1.0) | 15 Aug 2026 |
Read the published descriptions
- CVE-2026-91010, 17 Sep 2026
- The Invisible Anti-Spam & CAPTCHA - reCAPTCHA Alternative for All Forms WordPress plugin before 5.1.1 does not check the user's capabilities in its message deletion AJAX action, and only tests that a nonce parameter is present rather than validating it, allowing any authenticated user, such as a subscriber, to permanently delete every form submission the Invisible Anti-Spam & CAPTCHA - reCAPTCHA Alternative for All Forms WordPress plugin before 5.1.1 has stored. CVE record
- CVE-2026-16145, 15 Aug 2026
- The Invisible Anti-Spam & CAPTCHA - reCAPTCHA Alternative for All Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'action' parameter in all versions up to, and including, 5.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The stored payload is written by any unauthenticated admin-ajax.php request whose action value matches an entry in the plugin's explicit-actions list, which is auto-populated for common form builders at activation and requires no authentication gate to reach the save path. CVE record
- CVE-2026-16146, 15 Aug 2026
- 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. CVE record
- CVE-2026-16094, 15 Aug 2026
- 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. CVE record
What to do if you run Invisible Anti-Spam & CAPTCHA
If you run Invisible Anti-Spam & CAPTCHA, open WordPress and check the installed version in Plugins. Compare it with the affected versions in the vulnerability record. If a fixed version is available, take a current backup and update to that version or the latest supported release.
If no fixed version exists, consider disabling and removing the plugin or replacing it with a maintained alternative. After dealing with the affected software, check administrator users, unexpected file changes, redirects, unfamiliar pages and security logs for signs that the site may already have been altered.
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