CVE-2025-7877
Published: 20 July 2025
Summary
CVE-2025-7877 is a medium-severity Improper Access Control (CWE-284) 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 29.7th 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.
This control enforces ownership-based restrictions on portable storage device use, directly implementing access control over media insertion into organizational systems.
Hardware write-protect enforces access control on critical resources (e.g., firmware) independent of software state.
The access control policy and procedures directly mandate and enforce proper access control mechanisms across the organization.
Device lock enforces restricted access until re-authentication, directly reducing unauthorized use of active sessions.
Supervision and review of access control activities directly detects and remediates improper access configurations or usages.
Explicitly identifying and documenting actions permitted without identification or authentication enforces proper access control boundaries by defining justified exceptions.
By automatically labeling outputs with security attributes, the control supports attribute-based enforcement and reduces exploitability of improper access control weaknesses.
Associating and retaining security attributes with data directly supports enforcement of access control decisions across storage, processing, and transmission.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unrestricted file upload in public-facing MetaCRM web application (sendfile.jsp) enables remote exploitation of public-facing applications (T1190) and facilitates uploading tools or malware to stage capabilities on the victim environment (T1608.002), as explicitly noted in advisories.
NVD Description
A vulnerability, which was classified as critical, has been found in Metasoft 美特软件 MetaCRM up to 6.4.2. This issue affects some unknown processing of the file sendfile.jsp. The manipulation of the argument File leads to unrestricted upload. The attack may…
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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.
Deeper analysisAI
CVE-2025-7877 is a critical vulnerability in Metasoft 美特软件 MetaCRM versions up to 6.4.2, affecting the processing of the sendfile.jsp file. The flaw allows unrestricted file upload through manipulation of the File argument, classified under CWE-284 (Improper Access Control) and CWE-434 (Unrestricted Upload of File with Dangerous Type). It carries 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) and was published on 2025-07-20.
The vulnerability can be exploited remotely by an authenticated attacker with low privileges (PR:L), requiring no user interaction. Successful exploitation enables unrestricted file uploads, potentially leading to low-level impacts on confidentiality, integrity, and availability, such as executing malicious files if server permissions allow.
Advisories from VulDB (ctiid.316991, id.316991, submit.611252) document the issue, noting that a proof-of-concept exploit is publicly available on GitHub (FightingLzn9/vul/blob/main/MetaCRM6-Upload-4.md). The vendor was contacted early but provided no response, and no patches or mitigations are mentioned.
The exploit has been disclosed to the public and may be used, increasing the risk for unpatched MetaCRM deployments.
Details
- CWE(s)