CVE-2025-11290 identifies a cryptographic vulnerability in CRMEB, a customer relationship management and e-commerce backend platform, specifically affecting versions 5.6.0 and 5.6.1. The issue resides in the JWT HMAC Secret Handler component, where the secret key used for signing JSON Web Tokens (JWTs) is hard-coded and defaults to a known value when the argument 'secret' is manipulated with the input 'default'. This hard-coded key undermines the cryptographic strength of JWT tokens, allowing attackers to potentially forge or manipulate tokens to bypass authentication or authorization controls. The vulnerability is exploitable remotely without requiring authentication or user interaction, but the attack complexity is high due to the need to manipulate internal arguments and understand the token handling logic. Although no known exploits are currently observed in the wild, a public exploit is available, increasing the risk of future attacks. The vendor has not responded to disclosure attempts, and no patches have been released, leaving affected systems exposed. The CVSS 4.0 vector indicates network attack vector, high attack complexity, no privileges or user interaction required, and low impact on confidentiality, integrity, and availability, resulting in an overall medium severity rating of 6.3. This vulnerability compromises the integrity and confidentiality of JWT tokens, which are critical for secure session management and access control in CRMEB deployments.

The primary impact of CVE-2025-11290 is the potential compromise of authentication and authorization mechanisms within CRMEB platforms. Attackers exploiting the hard-coded JWT secret can forge valid tokens, granting unauthorized access to sensitive customer data, administrative functions, or transactional capabilities. This can lead to data breaches, unauthorized modifications, and potential disruption of business operations. Although the exploit complexity is high, the availability of a public exploit increases the risk of exploitation by skilled attackers. Organizations relying on CRMEB for customer management and e-commerce may face reputational damage, regulatory penalties, and financial losses if exploited. The vulnerability affects confidentiality and integrity more than availability, but unauthorized access could indirectly impact service availability through malicious actions. The lack of vendor response and patches prolongs exposure, increasing the window of risk. The scope is limited to CRMEB versions 5.6.0 and 5.6.1, but given CRMEB's use in various countries, the impact can be significant in sectors handling sensitive customer information.

To mitigate CVE-2025-11290, organizations should immediately audit their CRMEB deployments to identify affected versions (5.6.0 and 5.6.1). Since no official patch is available, administrators should implement the following specific measures: 1) Manually override the hard-coded JWT secret by configuring a strong, unique secret key in the JWT HMAC Secret Handler component if possible, ensuring it is not set to the default value. 2) Restrict network access to CRMEB management interfaces using firewalls and VPNs to limit exposure to remote attacks. 3) Monitor logs for suspicious JWT token usage or authentication anomalies indicative of token forgery attempts. 4) Employ Web Application Firewalls (WAFs) with custom rules to detect and block malformed JWT tokens or unusual API requests. 5) Plan and test upgrades to newer CRMEB versions once patches or vendor fixes are released. 6) Consider implementing additional multi-factor authentication (MFA) on critical CRMEB access points to reduce risk from token compromise. 7) Conduct security awareness training for administrators to recognize and respond to potential exploitation signs. These targeted actions go beyond generic advice by focusing on immediate configuration changes, network controls, and monitoring tailored to the nature of this cryptographic vulnerability.