robertpeake Login No Captcha reCAPTCHA Plugin up to 1.8.0 on WordPress xmlrpc.php authenticate PHP_SELF cross site scripting

Summaryinfo

A vulnerability classified as problematic was found in robertpeake Login No Captcha reCAPTCHA Plugin up to 1.8.0 on WordPress. This impacts the function Authenticate of the file xmlrpc.php. Executing a manipulation of the argument PHP_SELF can lead to cross site scripting. This vulnerability is tracked as CVE-2026-2374. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic was found in robertpeake Login No Captcha reCAPTCHA Plugin up to 1.8.0 on WordPress. This vulnerability affects the function authenticate of the file xmlrpc.php. The manipulation of the argument PHP_SELF with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

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.

The weakness was disclosed by ISMAILSHADOW. The advisory is available at wordfence.com. This vulnerability was named CVE-2026-2374 since 02/11/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

By approaching the search of inurl:xmlrpc.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-202605-6649). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• WordPress Plugin

Vendor

• robertpeake

Name

• Login No Captcha reCAPTCHA Plugin

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8.0

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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