CVE-2024-21546Public exploitNetwork attack vector

Remote code execution via special-character file extension

Published Dec 18, 2024 · Updated Aug 28, 2025

Code injection in UniSharp Laravel Filemanager before 2.9.1 allows remote attackers to execute PHP code through a crafted file upload. LfmUploadValidator trusts a client-supplied extension containing special characters, allowing a valid MIME type with a dot after the php suffix to evade executable-extension filtering. Exploitation requires a network-reachable upload route; UniSharp states that the default route should use working authentication middleware, and successful uploads run with the web application's privileges.

CVSS severityUnavailable
Unscored
EPSS probability1.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in UniSharp Laravel Filemanager before 2.9.1 allows remote attackers to execute PHP code through a crafted file upload. LfmUploadValidator trusts a client-supplied extension containing special characters, allowing a valid MIME type with a dot after the php suffix to evade executable-extension filtering. Exploitation requires a network-reachable upload route; UniSharp states that the default route should use working authentication middleware, and successful uploads run with the web application's privileges.

The record

CVE
CVE-2024-21546
Published
Dec 18, 2024
Updated
Aug 28, 2025
Vendor
UniSharp
Product
Laravel Filemanager
Classifications
CWE-94, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=0 <2.9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

UniSharp · Laravel Filemanagerversion=0 <2.9.1

Published CVSS scores

8.9SnykCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

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 exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
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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