CVE-2025-7876 in MetaCRM
Summary
by MITRE • 07/20/2025
A vulnerability classified as critical was found in Metasoft 美特软件 MetaCRM up to 6.4.2. This vulnerability affects the function AnalyzeParam of the file download.jsp. The manipulation of the argument p leads to deserialization. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 08/27/2025
The vulnerability identified as CVE-2025-7876 represents a critical security flaw within Metasoft 美特软件 MetaCRM version 6.4.2 and earlier releases. This weakness resides in the download.jsp file's AnalyzeParam function, where improper input validation creates an avenue for malicious exploitation. The vulnerability's classification as critical stems from its remote exploitability and the disclosed public exploit code that enables attackers to leverage this flaw without requiring physical access to the target system. The attack vector specifically targets the parameter p within the AnalyzeParam function, where unvalidated input flows directly into deserialization operations, creating a dangerous execution path for remote code injection.
The technical implementation of this vulnerability demonstrates a classic deserialization flaw that aligns with CWE-502, which specifically addresses the deserialization of untrusted data. When an attacker supplies malicious input through the p parameter, the application's deserialization process executes arbitrary code on the target server. This type of vulnerability is particularly dangerous because it can be exploited through web-based attacks without requiring authentication or privileged access. The flaw essentially allows attackers to craft specially formatted payloads that, when processed by the AnalyzeParam function, trigger the execution of malicious code within the application's runtime environment. The remote nature of the attack means that threat actors can exploit this vulnerability from anywhere on the internet, making it a high-priority concern for organizations running affected versions of MetaCRM.
The operational impact of CVE-2025-7876 extends far beyond simple data theft, as successful exploitation can result in complete system compromise and persistent backdoor access. Attackers who successfully leverage this vulnerability can gain administrative privileges, install malware, modify or delete sensitive data, and potentially use the compromised system as a launchpad for further attacks within the organization's network. The lack of vendor response to early disclosure efforts compounds the risk, as organizations have no assurance that a patch or mitigation will be forthcoming, leaving them vulnerable to ongoing exploitation. This scenario particularly aligns with ATT&CK technique T1059.007 for command and script interpreter, where adversaries use deserialization vulnerabilities to execute malicious commands through legitimate system processes.
Organizations affected by this vulnerability should immediately implement network-level mitigations including firewall rules that block access to the download.jsp endpoint and restrict remote access to the MetaCRM application until a proper patch is applied. Network segmentation and monitoring should be enhanced to detect unusual deserialization patterns or attempts to access the vulnerable parameter p. The lack of vendor response necessitates proactive defensive measures, including the implementation of web application firewalls that can detect and block malicious deserialization attempts. Security teams should also consider conducting thorough vulnerability assessments to identify other potential deserialization flaws within the application and related systems. The public disclosure of exploit code means that organizations cannot rely on the assumption that this vulnerability remains unknown to threat actors, as it is already being actively used in the wild. Additionally, incident response plans should be updated to include procedures for handling deserialization-based attacks, and regular security awareness training should emphasize the importance of patch management and the risks associated with unpatched critical vulnerabilities.