The Login No Captcha reCAPTCHA plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `$_SERVER['PHP_SELF']` superglobal in all versions up to, and including, 1.8.0. This is due to the `authenticate()` function storing the unsanitized output of `basename($_SERVER['PHP_SELF'])` in the `login_nocaptcha_error` WordPress option when a login attempt is made from a non-standard login page (e.g., xmlrpc.php). The `admin_notices()` function then echoes this stored value directly into the admin dashboard HTML without escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute when an administrator with a whitelisted IP address visits the WordPress dashboard within 30 seconds of the attack.
Metrics
Affected Vendors & Products
References
History
Fri, 29 May 2026 16:00:00 +0000
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Robertpeake
Robertpeake login No Captcha Recaptcha Wordpress Wordpress wordpress |
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Robertpeake
Robertpeake login No Captcha Recaptcha Wordpress Wordpress wordpress |
Thu, 28 May 2026 12:30:00 +0000
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ssvc
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Thu, 28 May 2026 04:45:00 +0000
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| Description | The Login No Captcha reCAPTCHA plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `$_SERVER['PHP_SELF']` superglobal in all versions up to, and including, 1.8.0. This is due to the `authenticate()` function storing the unsanitized output of `basename($_SERVER['PHP_SELF'])` in the `login_nocaptcha_error` WordPress option when a login attempt is made from a non-standard login page (e.g., xmlrpc.php). The `admin_notices()` function then echoes this stored value directly into the admin dashboard HTML without escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute when an administrator with a whitelisted IP address visits the WordPress dashboard within 30 seconds of the attack. | |
| Title | Login No Captcha reCAPTCHA <= 1.8.0 - Unauthenticated Stored Cross-Site Scripting via PHP_SELF | |
| Weaknesses | CWE-79 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Wordfence
Published: 2026-05-28T03:27:27.508Z
Updated: 2026-05-28T10:37:31.675Z
Reserved: 2026-02-11T20:47:31.042Z
Link: CVE-2026-2374
Updated: 2026-05-28T10:37:26.623Z
Status : Deferred
Published: 2026-05-28T05:16:34.290
Modified: 2026-05-28T13:45:25.260
Link: CVE-2026-2374
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