CVE-2026-91849Public exploitNetwork attack vector

Authenticated arbitrary file upload via setAvatar

Published Sep 15, 2026 · Updated Sep 15, 2026

Unrestricted file upload in WuzhiCMS 4.0 through 4.1.0 allows remote authenticated users to store arbitrary files through avatar upload. The member::setAvatar handler at /index.php?m=member&f=user&v=setAvatar accepts the File argument without restricting dangerous file types. A valid member session is required; the resulting server-side file write can host attacker-controlled content, while code execution depends on web-server handling.

CVSS severityUnavailable
Unscored
EPSS probability0.27%
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 WuzhiCMS 4.0 through 4.1.0 allows remote authenticated users to store arbitrary files through avatar upload. The member::setAvatar handler at /index.php?m=member&f=user&v=setAvatar accepts the File argument without restricting dangerous file types. A valid member session is required; the resulting server-side file write can host attacker-controlled content, while code execution depends on web-server handling.

The record

CVE
CVE-2026-91849
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Zhejiang Zoneland Zongheng Network Technology Co., Ltd.
Product
WuzhiCMS
Classifications
T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record 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=4.0
  2. Affected versionversion=4.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zhejiang Zoneland Zongheng Network Technology Co., Ltd. · WuzhiCMSversion=4.0; version=4.1.0

Published CVSS scores

No CVSS assessment is available in this record.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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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