CVE-2025-7877
Published: 20 July 2025
Summary
CVE-2025-7877 is a low-severity Improper Access Control (CWE-284) vulnerability in Metasoft Metacrm. Its CVSS base score is 2.1 (Low).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 44.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SI-10 (Information Input Validation).
Deeper analysis
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.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-21999
Vulnerability details
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.
- CWE(s)
Related Threats
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.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation of file uploads to reject dangerous types and malformed File arguments in sendfile.jsp.
Enforces access-control policy on the upload function so that only explicitly authorized subjects may write files.
Limits the privileges granted to authenticated users, reducing the chance that low-privilege accounts can perform unrestricted uploads.