CVE-2025-24628 in Google Captcha Plugin
Summary
by MITRE • 01/27/2025
Authentication Bypass by Spoofing vulnerability in BestWebSoft Google Captcha allows Identity Spoofing. This issue affects Google Captcha: from n/a through 1.78.
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Analysis
by VulDB Data Team • 01/27/2025
The vulnerability identified as CVE-2025-24628 represents a critical authentication bypass weakness within the BestWebSoft Google Captcha plugin, specifically impacting versions ranging from the initial release through 1.78. This flaw enables attackers to circumvent the intended security controls designed to verify user identity through CAPTCHA mechanisms. The vulnerability stems from insufficient validation of authentication tokens and user identity verification processes, creating a pathway for malicious actors to spoof legitimate user credentials and gain unauthorized access to protected systems or resources. The issue manifests when the plugin fails to properly authenticate and verify the legitimacy of user interactions, allowing spoofed requests to be processed as valid submissions.
The technical implementation of this vulnerability involves a failure in the CAPTCHA verification logic where the system does not adequately distinguish between genuine user interactions and forged requests. This weakness creates an identity spoofing attack vector where attackers can manipulate the authentication flow by crafting malicious requests that appear to have successfully completed CAPTCHA challenges. The vulnerability's impact extends beyond simple access control as it undermines the fundamental security assumptions of the plugin's protection mechanisms. According to CWE classification, this represents a weakness in authentication mechanisms where the system fails to properly validate user identity, potentially leading to privilege escalation or unauthorized system access. The vulnerability aligns with ATT&CK technique T1566.002 which involves social engineering through spoofing, where attackers manipulate system verification processes to bypass security controls.
The operational impact of CVE-2025-24628 is significant for any organization relying on the BestWebSoft Google Captcha plugin for security protection. Systems utilizing affected versions become vulnerable to automated attack vectors including bot networks that can bypass CAPTCHA protections to perform unauthorized actions such as spam submissions, account takeovers, or data exfiltration. The vulnerability particularly affects web applications that depend on CAPTCHA for form validation and user authentication, potentially allowing attackers to exploit the system's trust in CAPTCHA validation to gain unauthorized access to sensitive functionalities. Organizations running these vulnerable plugins face increased risk of credential stuffing attacks, automated form submissions, and other malicious activities that rely on bypassing CAPTCHA mechanisms. The attack surface expands when considering that CAPTCHA systems are often deployed to protect critical user registration, login, and submission processes, making this vulnerability particularly dangerous for web applications handling sensitive user data or transactional operations.
Mitigation strategies for CVE-2025-24628 require immediate action to update the BestWebSoft Google Captcha plugin to versions that address the authentication bypass weakness. System administrators should implement comprehensive monitoring to detect unusual authentication patterns or suspicious CAPTCHA validation requests that might indicate exploitation attempts. The recommended approach includes applying the vendor's security patches as soon as they become available, while also implementing additional security layers such as rate limiting, IP address monitoring, and enhanced logging of authentication events. Organizations should also consider implementing multi-factor authentication as a defense-in-depth strategy to reduce the impact of potential exploitation. Security teams must conduct thorough vulnerability assessments of all systems utilizing the affected plugin and ensure that proper access controls are implemented to limit the potential damage from any successful exploitation attempts. Regular security audits should verify that CAPTCHA implementations properly validate user identity and that spoofing attempts are effectively detected and blocked. The remediation process should include comprehensive testing to ensure that updated systems maintain proper functionality while eliminating the authentication bypass vulnerability that renders the CAPTCHA protection ineffective.