CVE-2024-2636Network attack vector

Unauthenticated code execution via unrestricted JSP upload

Published Mar 19, 2024 · Updated Aug 13, 2024

Unrestricted file upload in Cegid Meta4 HR 819.001.022 and earlier allows remote attackers to execute code via a crafted JSP file. The update_password.jsp endpoint uses the M4_NEW_PASSWORD parameter to store an attacker-supplied JSP in an executable application directory. Exploitation requires the M4WebServices config folder to remain exposed on an Internet-facing server; loading the stored JSP executes its code.

CVSS severity9.0
Critical
EPSS probability0.55%
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 Cegid Meta4 HR 819.001.022 and earlier allows remote attackers to execute code via a crafted JSP file. The update_password.jsp endpoint uses the M4_NEW_PASSWORD parameter to store an attacker-supplied JSP in an executable application directory. Exploitation requires the M4WebServices config folder to remain exposed on an Internet-facing server; loading the stored JSP executes its code.

The record

CVE
CVE-2024-2636
Published
Mar 19, 2024
Updated
Aug 13, 2024
Vendor
Cegid
Product
Meta4 HR
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=819.001.022

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cegid · Meta4 HRversion=819.001.022

Published CVSS scores

9.0INCIBE-CERTCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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