CVE-2026-1202 is an authentication bypass vulnerability identified in CRMEB, a customer relationship management and e-commerce platform, affecting versions 5.6.0 through 5.6.3. The flaw resides in the appleLogin function within the LoginController.php file, where improper handling of the openId parameter allows an attacker to manipulate this argument to bypass normal authentication controls. This vulnerability can be exploited remotely without requiring any privileges or user interaction, making it relatively easy to exploit. The improper authentication means attackers can potentially gain unauthorized access to user accounts or administrative functions depending on the application’s role management, although the CVSS vector indicates limited impact on confidentiality, integrity, and availability. The vendor was notified early but has not issued any response or patch, and while no confirmed exploits are reported in the wild, proof-of-concept exploit code has been publicly released, increasing the risk of active exploitation. The vulnerability’s CVSS 4.0 score of 6.9 (medium severity) reflects the ease of exploitation and the potential for unauthorized access, but with limited scope and impact on system-wide security. The lack of vendor response and patch availability means organizations must rely on alternative mitigation strategies until an official fix is released.

For European organizations using CRMEB versions up to 5.6.3, this vulnerability poses a significant risk of unauthorized access to CRM systems, potentially exposing sensitive customer data, business intelligence, and internal communications. Unauthorized access could lead to data leakage, manipulation of customer records, fraudulent transactions, or disruption of business processes. Given CRMEB’s role in managing customer relationships and e-commerce functions, exploitation could damage organizational reputation and customer trust. The medium severity rating indicates that while the impact on confidentiality, integrity, and availability is limited, the ease of remote exploitation without authentication increases the likelihood of attacks. Organizations in sectors with high reliance on CRMEB, such as retail, services, and online commerce, are particularly vulnerable. The absence of vendor patches increases exposure duration, emphasizing the need for immediate mitigation. Additionally, regulatory compliance risks arise if personal data is compromised, potentially triggering GDPR penalties.

Since no official patches are available, European organizations should implement the following specific mitigations: 1) Apply strict input validation and sanitization on the openId parameter at the application or web server level to block malformed or suspicious values. 2) Employ Web Application Firewalls (WAFs) with custom rules to detect and block attempts to exploit the appleLogin function. 3) Monitor authentication logs closely for unusual login patterns or repeated failed attempts involving the appleLogin endpoint. 4) Restrict access to the vulnerable API endpoint by IP whitelisting or VPN access where feasible. 5) Consider temporarily disabling or limiting the appleLogin feature if it is not critical to business operations. 6) Implement multi-factor authentication (MFA) for CRMEB user accounts to reduce the risk of unauthorized access even if authentication bypass occurs. 7) Prepare incident response plans specifically addressing potential exploitation scenarios. 8) Engage with CRMEB vendor support channels persistently to obtain patches or official guidance. 9) Keep CRMEB installations isolated from critical infrastructure and sensitive data stores to limit lateral movement in case of compromise.