CVE-2024-2561Public exploitNetwork attack vector

Authenticated arbitrary file upload via unchecked image type

Published Mar 17, 2024 · Updated Aug 8, 2024

Unrestricted file upload in 74CMS 3.28.0 allows remote authenticated users to write attacker-controlled files via imgBase64. sendCompanyLogo derives the saved extension from the data:image subtype and writes the decoded body without restricting that subtype to permitted image formats. A low-privilege session can therefore create a PHP file in the upload path; code execution depends on the web server executing PHP there.

CVSS severity8.8
High
EPSS probability6.08%
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 74CMS 3.28.0 allows remote authenticated users to write attacker-controlled files via imgBase64. sendCompanyLogo derives the saved extension from the data:image subtype and writes the decoded body without restricting that subtype to permitted image formats. A low-privilege session can therefore create a PHP file in the upload path; code execution depends on the web server executing PHP there.

The record

CVE
CVE-2024-2561
Published
Mar 17, 2024
Updated
Aug 8, 2024
Vendor
广西南宁领众网络科技有限公司
Product
骑士人才系统 (74CMS)
Classifications
CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 8, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.28.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

广西南宁领众网络科技有限公司 · 骑士人才系统 (74CMS)version=3.28.0

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.3VulDBCVSS:3.1/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.

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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

CWE-434Unrestricted Upload of File with Dangerous Type
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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