Stored cross-site scripting in WPS Limit Login - #VU19348

Detailed vulnerability description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in admin area in the "/blocks/whitelist.php" file on 2-3 lines. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

2-3 lines:

$wps_limit_login_white_list_ips = $this->get_option( 'wps_qlimit_login_whitelist' );

$wps_limit_login_white_list_ips = ( is_array( $wps_limit_login_white_list_ips ) && ! empty( $wps_limit_login_white_list_ips ) ) ? implode( "\n", $wps_limit_login_white_list_ips ) : '';

Remediation

Sources

• https://secupress.me/blog/wps-limit-login-v1-4-5-multiple-vulnerabilities/