CVE-2025-7877Public exploitNetwork attack vector

Dangerous file upload via unchecked extension

Published Jul 20, 2025 · Updated Jul 21, 2025

Unrestricted file upload in MetaCRM 6.4.0 through 6.4.2 allows remote authenticated users to store dangerous files via sendfile.jsp. The upload handler concatenates path and fieldID and saves the result without validating the supplied file extension. A valid low-privilege session is required; server-side execution follows when the uploaded extension is handled as executable content.

CVSS severity9.8
Critical
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in MetaCRM 6.4.0 through 6.4.2 allows remote authenticated users to store dangerous files via sendfile.jsp. The upload handler concatenates path and fieldID and saves the result without validating the supplied file extension. A valid low-privilege session is required; server-side execution follows when the uploaded extension is handled as executable content.

The record

CVE
CVE-2025-7877
Published
Jul 20, 2025
Updated
Jul 21, 2025
Vendor
Beijing Meite Software Technology Co., Ltd.
Product
MetaCRM
Classifications
CWE-434, CWE-284, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.4.0
  2. Affected versionversion=6.4.1
  3. Affected versionversion=6.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Beijing Meite Software Technology Co., Ltd. · MetaCRMversion=6.4.0; version=6.4.1; version=6.4.2

Published CVSS scores

2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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