CVE-2025-7216 is a deserialization vulnerability identified in the lty628 Aidigu software versions up to 1.8.2, specifically affecting the checkUserCookie function within the /application/common.php file. The vulnerability arises from improper handling of the 'rememberMe' argument, which is deserialized without adequate validation or sanitization. This flaw allows an attacker to remotely supply crafted serialized data to the PHP Object Handler component, triggering unsafe deserialization. Exploiting this vulnerability can lead to arbitrary code execution or other malicious actions, as deserialization vulnerabilities often allow attackers to manipulate application logic or execute injected payloads. The vulnerability is remotely exploitable without requiring authentication or user interaction, increasing its risk profile. The CVSS v4.0 score is 6.9, categorized as medium severity, reflecting the network attack vector, low complexity, and no privileges or user interaction needed. However, the impact on confidentiality, integrity, and availability is rated low, suggesting limited direct damage but still significant due to the potential for remote code execution. Although no public exploits are currently known in the wild, the exploit details have been disclosed publicly, increasing the likelihood of future exploitation. No official patches or mitigations have been linked yet, indicating that affected organizations must proactively implement defensive measures. The vulnerability's presence in a PHP-based web application component makes it particularly relevant for environments relying on Aidigu for user session management or authentication persistence.

For European organizations using lty628 Aidigu versions 1.8.0 through 1.8.2, this vulnerability poses a tangible risk of remote compromise. Successful exploitation could allow attackers to execute arbitrary code on affected servers, potentially leading to unauthorized access, data leakage, or disruption of services. Given that the vulnerability does not require authentication or user interaction, attackers can target exposed web applications directly over the network. This increases the risk for public-facing services, especially those handling sensitive user data or critical business functions. In sectors such as finance, healthcare, and government, where data confidentiality and service availability are paramount, exploitation could result in regulatory non-compliance, reputational damage, and operational downtime. Moreover, the disclosed exploit details may accelerate attack attempts, necessitating urgent attention. The medium severity rating suggests that while the vulnerability is serious, the overall impact might be mitigated by existing security controls or the specific deployment context. However, organizations lacking robust network defenses or running unpatched versions are at higher risk. The absence of known exploits in the wild currently provides a limited window for remediation before active attacks emerge.

European organizations should immediately audit their environments to identify any deployments of lty628 Aidigu versions 1.8.0, 1.8.1, or 1.8.2. In the absence of an official patch, organizations should consider the following specific mitigations: 1) Disable or restrict the use of the 'rememberMe' functionality if feasible, to prevent deserialization of untrusted input. 2) Implement Web Application Firewall (WAF) rules to detect and block suspicious serialized payloads targeting the checkUserCookie function or the 'rememberMe' parameter. 3) Employ input validation and sanitization at the application level to reject malformed or unexpected serialized data. 4) Restrict network access to the affected application components, limiting exposure to trusted internal networks where possible. 5) Monitor application logs and network traffic for anomalous activity indicative of exploitation attempts, such as unusual serialized data patterns or unexpected requests to the vulnerable endpoint. 6) Prepare for rapid deployment of official patches once released by the vendor and maintain close communication with lty628 for updates. 7) Conduct security awareness training for developers and administrators on the risks of insecure deserialization and secure coding practices. These targeted actions go beyond generic advice by focusing on the specific vulnerable parameter and function, leveraging network controls, and emphasizing proactive detection.