CVE-2025-7876
Published: 20 July 2025
Summary
CVE-2025-7876 is a medium-severity Improper Input Validation (CWE-20) vulnerability in Metasoft Metacrm. Its CVSS base score is 6.3 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 33.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Security testing and evaluation at multiple SDLC stages directly detects missing or flawed input validation, with the required remediation process ensuring fixes are applied.
Directly implements checks on information inputs to reject invalid data before processing.
Penetration testing supplies malicious serialized objects, detecting unsafe deserialization and supporting corrective actions.
Security testing and developer training directly verify and enforce proper input validation, reducing exploitability of injection and malformed-data weaknesses.
Untrusted serialized data can be deserialized and observed inside the chamber, blocking gadget-chain exploitation outside the sandbox.
Identifies and blocks malicious code introduced through deserialization of untrusted data at system boundaries.
Integrity verification of serialized information can detect tampering before deserialization occurs.
Spam protection mechanisms perform filtering and detection on inbound/outbound messages, directly compensating for missing or weak input validation of unsolicited content.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Deserialization vulnerability (CWE-502) in public-facing download.jsp allows remote code execution via manipulation of parameter 'p', directly enabling exploitation of a public-facing application.
NVD Description
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…
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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.
Deeper analysisAI
A critical deserialization vulnerability, tracked as CVE-2025-7876, affects Metasoft MetaCRM versions up to 6.4.2. The issue resides in the AnalyzeParam function within the download.jsp file, where manipulation of the 'p' argument triggers unsafe deserialization of untrusted data. This flaw is linked to CWE-20 (Improper Input Validation) and CWE-502 (Deserialization of Untrusted Data), with a CVSS v3.1 base score of 6.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).
The vulnerability enables remote exploitation by an authenticated attacker with low privileges. By crafting a malicious 'p' parameter, the attacker can trigger deserialization, potentially leading to limited impacts on confidentiality, integrity, and availability, such as unauthorized data access, modification, or denial of service within the application's scope.
Advisories from VulDB and a public GitHub repository detail the issue but note no vendor response despite early contact. No patches or official mitigations are available, and a proof-of-concept exploit has been publicly disclosed, increasing the risk of active use.
The exploit disclosure heightens the urgency for MetaCRM users to restrict access to the affected endpoint and monitor for anomalous download.jsp activity until a patch emerges.
Details
- CWE(s)