CVE-2025-4768Public exploitNetwork attack vector

Authenticated code execution via unchecked JSP upload

Published May 16, 2025 · Updated May 16, 2025

Unrestricted file upload in MegaGao production_ssm 1.0 allows remote authenticated users to execute code by uploading a crafted JSP file. PictureServiceImpl.uploadPicture concatenates the client-supplied filename with the image save path and writes the file without enforcing a server-side extension allowlist. A valid backend session and a Tomcat mapping that serves the upload directory are required; requesting the stored JSP executes commands with the application server's privileges.

CVSS severity5.3
Medium
EPSS probability0.32%
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 MegaGao production_ssm 1.0 allows remote authenticated users to execute code by uploading a crafted JSP file. PictureServiceImpl.uploadPicture concatenates the client-supplied filename with the image save path and writes the file without enforcing a server-side extension allowlist. A valid backend session and a Tomcat mapping that serves the upload directory are required; requesting the stored JSP executes commands with the application server's privileges.

The record

CVE
CVE-2025-4768
Published
May 16, 2025
Updated
May 16, 2025
Vendor
MegaGao
Product
production_ssm
Classifications
CWE-284, CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 16, 2025CVE publishedPublication date reported by the CVE source.
  2. May 16, 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=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MegaGao · production_ssmversion=1.0

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
5.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
6.3VulDBCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Server Software Component: Web Shell

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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