CVE-2025-9406Public exploitNetwork attack vector

Authenticated arbitrary file upload via missing type checks

Published Aug 25, 2025 · Updated Aug 25, 2025

Unrestricted file upload in Xu Huisheng Lemon 1.13.0 and earlier allows remote authenticated users to store dangerous file types. CmsArticleController.uploadImage passes uploads through LocalStoreClient.saveStore to FileStoreHelper.saveStore, which renames each file but never validates its type. A low-privileged web session is required, and exploitation stores attacker-chosen file content; the available evidence does not establish code execution.

CVSS severity9.8

Critical

EPSS probability0.38%

Next 30 days · Sep 16, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkNot available

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Summary

What happened

The record

CVE: CVE-2025-9406
Published: Aug 25, 2025
Updated: Aug 25, 2025

Vendor: Xu Huisheng
Product: Lemon
Classifications: CWE-434, CWE-284, T1105

Attack vector: network
Privileges: authenticated

Timeline

How it unfolded

Aug 25, 2025CVE publishedPublication date reported by the CVE source.
Aug 25, 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.

Affected versionversion=1.0
Affected versionversion=1.1
Affected versionversion=1.10
Affected versionversion=1.11
Affected versionversion=1.12
Affected versionversion=1.13.0
Affected versionversion=1.2
Affected versionversion=1.3
Affected versionversion=1.4
Affected versionversion=1.5
Affected versionversion=1.6
Affected versionversion=1.7
Affected versionversion=1.8
Affected versionversion=1.9

What conditions does exploitation require?

Attack vectornetwork

Required privilegesauthenticated

What is affected?

Xu Huisheng · Lemonversion=1.0; version=1.1; version=1.10; version=1.11; version=1.12; version=1.13.0; version=1.2; version=1.3; version=1.4; version=1.5; version=1.6; version=1.7; version=1.8; version=1.9

Published CVSS scores

6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P

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-434Unrestricted Upload of File with Dangerous Type

CWE-284Improper Access Control

T1105Ingress Tool Transfer

Public exploit references

uploadImage unrestricted-upload proof of conceptproof of concept · demonstrated

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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