CVE-2025-7876Public exploitNetwork attack vector

Authenticated code execution via unsafe Fastjson deserialization

Published Jul 20, 2025 · Updated Jul 21, 2025

Unsafe deserialization in MetaCRM 6.4.0 through 6.4.2 allows remote authenticated users to execute code via a crafted p parameter. /business/common/download.jsp passes the attacker-controlled value to AnalyzeParam, which decrypts it with a hardcoded AES key and processes it as Fastjson without restricting object types. CNA scoring requires an account, and a crafted gadget chain triggers an RMI lookup and code execution in the server process.

CVSS severity9.8
Critical
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in MetaCRM 6.4.0 through 6.4.2 allows remote authenticated users to execute code via a crafted p parameter. /business/common/download.jsp passes the attacker-controlled value to AnalyzeParam, which decrypts it with a hardcoded AES key and processes it as Fastjson without restricting object types. CNA scoring requires an account, and a crafted gadget chain triggers an RMI lookup and code execution in the server process.

The record

CVE
CVE-2025-7876
Published
Jul 20, 2025
Updated
Jul 21, 2025
Vendor
Beijing Meite Software Technology Co., Ltd.
Product
MetaCRM
Classifications
CWE-20, CWE-502, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
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
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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-20Improper Input Validation
CWE-502Deserialization of Untrusted Data
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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