CVE-2025-7876 is a deserialization vulnerability identified in Metasoft 美特软件 MetaCRM versions up to 6.4.2, specifically within the AnalyzeParam function of the download.jsp file. The vulnerability arises from unsafe deserialization of the argument 'p', which can be manipulated by an attacker to execute arbitrary code or cause unexpected behavior. Deserialization vulnerabilities occur when untrusted data is processed by an application expecting serialized objects, allowing attackers to craft malicious payloads that, when deserialized, can lead to remote code execution or other severe impacts. This vulnerability is remotely exploitable without requiring user interaction or authentication, increasing its risk profile. The vendor has not responded to early notifications, and no patches or mitigations have been publicly released. Although the CVSS v4.0 score is 5.3 (medium severity), the presence of remote unauthenticated exploitation and deserialization suggests a significant risk if exploited. No known exploits are currently observed in the wild, but public disclosure of the exploit code increases the likelihood of future attacks. The vulnerability affects a CRM product widely used for customer relationship management, potentially exposing sensitive business data and operational processes if compromised.

For European organizations using MetaCRM, this vulnerability poses a risk to confidentiality, integrity, and availability of customer data and internal business processes. Successful exploitation could lead to unauthorized access, data leakage, or disruption of CRM services, which are critical for sales, marketing, and customer support functions. Given the remote and unauthenticated nature of the attack vector, attackers could compromise systems without insider access, increasing the threat landscape. The lack of vendor response and absence of patches exacerbate the risk, forcing organizations to rely on compensating controls. The impact is particularly concerning for sectors with strict data protection regulations such as GDPR, where breaches could lead to regulatory penalties and reputational damage. Additionally, disruption of CRM systems can affect business continuity and customer trust. While no active exploitation is reported, the public availability of exploit details necessitates urgent attention to prevent potential attacks.

European organizations should immediately audit their MetaCRM deployments to identify affected versions (6.4.0 to 6.4.2). In the absence of official patches, organizations should implement network-level restrictions to limit access to the download.jsp endpoint, ideally restricting it to trusted internal IPs or VPN users. Web application firewalls (WAFs) should be configured to detect and block suspicious deserialization payloads targeting the 'p' parameter. Monitoring and logging of access to download.jsp should be enhanced to detect anomalous activity. Organizations should consider isolating or sandboxing MetaCRM instances to limit potential damage from exploitation. If feasible, upgrading to a non-vulnerable version or switching to alternative CRM solutions should be evaluated. Additionally, organizations should prepare incident response plans specific to this vulnerability and educate relevant personnel about the risks. Regular backups and integrity checks of CRM data are recommended to facilitate recovery in case of compromise.