CVE-2026-10552
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk4th percentile — higher than 4% of all known CVEs
Summary
The Blue Captcha plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to and including 2.0.1. The issue arises from missing or incorrect nonce validation on the main admin panel and on subpages, allowing unauthenticated attackers to perform destructive operations.
Risk Assessment
Attackers can uninstall the plugin, delete audit logs, remove Hall of Shame entries, and add arbitrary IP addresses to the block list, potentially leading to serious security breaches within the organization.
Recommendation
It is recommended to update the plugin to the latest version and implement additional security measures, such as nonce validation, to prevent such attacks.
Original NVD description (English source)
The Blue Captcha plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to and including 2.0.1. This is due to missing or incorrect nonce validation on the main admin panel (blcap_main_page) and on the Hall of Shame and Log subpages, which accept a 'blcap_action' / 'action' parameter from $_REQUEST and perform destructive operations (plugin uninstall via blcap_uninstall(), log deletion via blcap_delete_logs(), Hall of Shame deletion via blcap_delete_ip_db(), and adding IPs to the banned list via update_option('blcap_settings')) with no wp_verify_nonce(), check_admin_referer(), or check_ajax_referer() calls anywhere in the codebase. This makes it possible for unauthenticated attackers to uninstall the plugin, delete audit logs, remove Hall of Shame entries, and add arbitrary IP addresses to the block list via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.