Login No Captcha reCAPTCHA <= 1.8.0 - Unauthenticated Stored Cross-Site Scripting via PHP_SELF

Wordfence Intelligence > Vulnerability Database > Login No Captcha reCAPTCHA <= 1.8.0 - Unauthenticated Stored Cross-Site Scripting via PHP_SELF

7.2

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVE	CVE-2026-2374
CVSS	7.2 (High)
Publicly Published	May 27, 2026
Last Updated	May 28, 2026
Researcher	ISMAILSHADOW

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.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

References

Vulnerability Details for Login No Captcha reCAPTCHA

Login No Captcha reCAPTCHA

Software Type	Plugin
Software Slug	login-recaptcha (view on wordpress.org)
Patched?	Yes
Remediation	Update to version 1.8.1, or a newer patched version
Affected Version	<= 1.8.0
Patched Version	1.8.1

Recent vulnerabilities in Login No Captcha reCAPTCHA

5.3

CVE-2022-2913

Aug 16, 2022

Researcher: Daniel Ruf

#	Title	CVE ID	CVSS	Researchers	Date
1	Login No Captcha reCAPTCHA <= 1.6.11 - CAPTCHA Bypass via Whitelisted IP Address Spoofing	CVE-2022-2913	5.3	Daniel Ruf	August 16, 2022

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